Chemistry

1. Zinc is not present in bronze
2. Dynamite was invented by Nobel
3. Periodic table was given by Mendeleev
4. Reduction is addition of Hydrogen.
5.Oxidation is addition of Oxygen.
5. The galvanized iron pipes are coated with zinc.
8. Non-stick kitchenwares are coated with Teflon.
9. Gobar gas mainly contains methane.
10. The chief constituent of vinegar is acetic acid.
11. The fibre least prone to catch fire is cotton.
12. Setting of plaster of paris involves dehydration process.
13. The chemical name for the compound having formula NaOH is sodium hydroxide.
14. Helium gas is filled in balloons because it is lighter than air.
17. What happens to the equivalent conductance of an electrolyte on dilution? may increase or decrease depending on the electrolyte
19. Cotton fibre is made up of cellulose.
20. Protein metabolism is carried out by Vitamin B2.
21. The first insecticide produced in India is DDT.
22. Piezo-electric effect is exhibited by quartz.
23. Isotopes have the same atomic number.
24. Lunar caustic is silver nitrate(AgNO3).
25. Which of the following is true? all ores are minerals
26. The colourless gas with the smell of rotten fish is PH3
27. The fungicide Bordeaux mixture consists of boric acid and calcium hydroxide
28. The substance used in the manufacture of high voltage insulators is silicons
29. Tobacco is preserved from drying out in glycerol
31. Which one of the following is incorrectly matched? Basic salt – Cu (OH)NO3
32. Natural rubber is a polymer derived from isoprene
33. Butane dioic acid is adipic acid
34. Carborandum is SiC
35. 20ca40 and 19k40 are isotones
36. Epsom salt is MgSo4.7H2O
37. Which one of the following is an explosive? Trinitro toluene
38. The number of ions produced from one molecule of K4Fe(CN)6 in aqueous solution is 5
39. The formula which is used to calculate the maximum number of electrons in the principle quantum number is 2n2
40. Trimethyl benzene is called mesitylene
41. The formula of plaster of paris is
CaS04 H2O
42. A white powder insoluble in water dissolves in ammonium hydroxide. It could be silver chloride
43. Mass number of an element represents number of protons and neutrons
45. The commonly used refrigerant in fridges is freons
48. Sodium thiosulphate is widely used in photography. Its main role in photographic process is due to reduction
49. If the percentage of oxygen in a metallic oxide is 33.33%, then its equivalent mass is 16
50. In nature borax occurs as Tincal
52 Petroleum mainly contains aromatic hydrocarbons
53. Bhopal gas tragedy of 1984 was caused by one of the following compounds: Methyl isocyanate
54. pH of blood is 7.4
55. The blue colour of water in the sea is due to scattering of blue light by water molecules
56. The acid present in vinegar is CH3COOH
57. When a lead storage battery is discharged H2SO4 is consumed
58. Combustion chemically is decomposition
59. Cinnamic acid is prepared by Perkin’s reaction
60. The number of isomers in the aromatic compound with the formula C8H10 is 2
61. Trimethy benzene is called mesitylene
62. Benzaldehyde on treatment with chlorine in the absence of catalyst gives P-chlorobenzaldehyde
63. Salicylic acid is prepared by Kolbe’s reaction
64. What is the formula of plaster of paris? CaSO4.1/2H2O
65. Tartar emetic is potassium antimonyl tartrate
67. Mass number of an element represents number of protons and neutrons
68. Mohr’s salt is (NM4)2Fe(SO4)26H2O
69. The absorbent used in colour chromato-graphic method is benzene
70. The number of orbitals in f sub – shell energy level is 6
71. In the periodic table, the elements present the groups from 3 to 12 are known as d-block
72. The effect which represents the splitting of spectral lines by external magnetic field is Zeeman effect
74. On the right-hand side of the periodic table are the non-metals
75. A solution of sodium acetate in water will turn blue litmus to red
76. Which of the following elements is the most electronegative? fluorine
77. Which one of the following is incorrectly matched? Basic salt – NaCHO3
79. The number of isomers in the aromatic organic compound with molecular formula C7H8O is 5
80. Silver nitrate produces a black stain on skin due to its reduction to metallic silver
81. Copper sulphate solution is acidic in nature due to hydrolysis
82. A white powder, insoluble in water dissolves in ammonium hydroxide, could be silver chloride
83. Epsom salt is MgSO4.7H2O
84. Biogas mainly contains methane
85. Acid rain is caused by the pollutants H2O and SO2
86. Acetyl salicylic acid is commonly used as a pain killer
87. Which solution will have the highest boiling point? 1% solution of glucose in water
88. The disaccharide present in milk is lactose
89. Natural petroleum is a liquid mixture of paraffin hydrocarbons C5toC15
90. Which gas is commonly filled in giant balloons? helium
91. The chemical added to the colourless LPG cooking gas to give odour is bromine
92. Which of the following gases may cause acid rain in an industrial area? SO2
93. Which of the following contains poly unsaturated fatty acids in largest amount? sunflower oil
94. The drugs caffeine, tannin, nicotine are steroids
95. Urea is a ….. fertilizer potash
96. Coloured glass, coral, ruby glass, metal alloys are colloidal solutions of
solid in a solid
97. Which carbohydrate is not a hexose? mannose
98. Which is not correctly matched? Haworth – Synthesis of anthracene
99. A solution f potassium nitrate is alkaline
100. How is the degree of hardness of water expressed? ppm of magnesium carbonate
101. Vinegar is 6-10% acetic acid
102. Gobar gas is a mixture of CH4, CO2&H2
103. Sand is SiO2
104. Rainwater helps to increase the ….of the soil nitrogen content
105. Which one of the following is not found in protein? S
106. Heavy water is the name given to D2O
107. Magnetron is used for the production of Cathode rays
108. Aqua-regia consists of HCI and HNO3
109. The fertilizer essential for the growth of tobacco is potassium nitrater
110. National chemical laboratory is at Pune
111. The ore of manganese is pyrolusite
112. Copper sulphate solution conducts the current by ions
114. First atomic model was proposed by John Dalton
115. Lack of essential amino acids in diet causes Kwashiorkor
117. Number of amino acids that can be synthesized by the human body is 20
118. Which one of the following is a biomolecule? glutamic acid
120. The foul smell of rancid butter is due to Butyric acid
121. The organic compound used for silvering mirrors is acetaldehyde
122. What is the chemical name of marble? calcium carbonate
123. Which is not an isotope of hydrogen? yttrium
124. Which substance is obtained by the hydrolysis of oil? glycerol
125. What are paraffins? alkenes
126. In lighting which gas is produced? NO2
127. Rolled gold is an alloy of Cu and Al
128. Freezing mixture may contain ice and sodium chloride
129. Lunar caustic is AgNO3
130. Global warming is due to the release of this gas carbon-di-oxide
131. Which metal does not form amalgam? Fe
132. Which of the following electronic configurations is the stablest? s2
134. Which acid does not contain-COOH group? picric acid
135. Calciferol is Vitamin D
136. All acids essentially contain this element hydrogen
137. Atomic number denotes the number of protons in an atom
138. The properties of elements are
periodic function of their atomic weights. This statement was given by Mendeleef
139. The catalyst used in the conversion of white phosphorous to red phosphorous is iodine
140. Slaked lime is Ca (OH)2
141. A preservative for biological specimen is formaldehyde
142. Maltase is an enzyme
143. The compound with a functional group COOH is called carboxylic acid
144. The number of isomers for C2H6O is one
145. Air contains maximum amount of nitrogen
146. Strong reducing agent is KMnO4
147. Indane gas is butane + propane
148. An element has atomic weight 24 and equivalent weight 11.9. Its valency is 2
149. Dry ice is Solid CO2
150. The gas which is responsible for the rise in the mean temperature of the world is carbon-di-oxide
201. Fat is a lipid
202. Calorific value is in the order of fats? carbohydrates ?proteins
203. Vulcanisation is the process of a adding sulphur
204. Which one of the following is not a radioactive substance? calcium
205. Optical isomers have both (A) and (B)
206. The element with the maximum number of isotopes in nature is hydrogen
207. How can a given colourless liquid be tested whether it is water or not ? adding a pinch of anhydrous copper sulphate
208. For what purpose is alum used by dyers of cloth? as a mordant
209. Polymer of amino acid is protein
210. Which gas is used in the preparation soda water? carbon dioxide
211. Which of the following compounds gives lodoform reaction? acetone
212. The oxidation number of C in oxalic acid (H2C204) is 3
213. Cooking oil can be converted into vegetable ghee by the process of hydrogenation
214. Which is an example of fermented beverage? wine
215. Oil of winter green is Methyl salicylate
216. A part from carbon and hydrogen pyridine contains nitrogen
217. The chemical name for vitamin C is ascorbic acid
218. Milk is an example of emulsion
219. The mass number of hydrogen is 1
220. Bakelite is obtained from Phenol and formaldehyde
221. During dehydration the body loses
222. The hormone that contains iodine is thyroxin
223. Green house effect causes growth of plant in glass house
224. The hybridization of carbon in ethane is dsp2
225. Which is the weakest? lonic bond
226. Ornamental gold contains copper
227. Which is used to produce artificial rain? silver nitrate
228. Which metal is involved in galvanization process zinc
229. The alcohol used in the preparation of dynamite is glycerol
230. Why there is a spluttering sound when water is sprincked on hot oil? boiling point of oil is higher than that of water
231. Which of the following is used as a dehydrating agent? HCLO4
232. Wood is preserved from attack by termites by a material marketed as creosote oil, this is a mixure of tar and water
233. In gobar gas plant, which one of the following gases is released? cresols
234. The heat of neutralization is constant of strong acid strong base
235. The strength of the solution of 4g of NaOH in 1litre is 0.01 N
236. The name Victor Meyer is associated with distinction of aldehydes and ketones
237. A peptide is polyalcohol
238. The oxidation number of chromium is K2Cr2 07 is 1
239. The Indicator used in the titration between KMn04 and FeSO4 is none
240. ?H = ?E +?nRT
241. The shape of methane is square planer
242. If pH =7, pOH =? 14
243. The lewis base among the following is AI (OH)3
244. The non-reducing sugar among the following fructose
245. The one, which is not a colligative property, is viscosity
246. The ion that does not cause hardness of water HCO3
247. Rocket fuel is hydrazine and dinitrogen tetroxide
249. Compound that decolorizes bromine water is acetylene
250. power alcohol is a mixure of ethyl alcohol + petrol
251. Which one of the following is a transition element? copper
252. The isotope 7N14 contains all of these
253. An atom of chlorine with atomic number 17 and mass number 35, contains in its nucleus 18 neutrons
254. Strach on hydrolysis gives Glucose
255. Which of the following helps the fermentation process? adding enzymes
256. Methylated spirit is 95% ethanol
257. Stainless steel is an alloy of steel+ chromium + nickesl
258. Diabasic acid is sulphuric acid
259. Element which is an enemy of copper is sulphur
260. Which one of the following is a chemical reaction? combustion of carbon
261. The element used in lead pencils is Carbon
262. Carbon monoxide is atphoteric
263. The amount of nitrogen present in the atmospheric air is about 78%
264. Molecular weight = ? X vapour density is 2
265. Metal ore, galena contains lead
266. DDT is an insecticide
267. Rare gases are di-atomic
268. Iodine with starch gives the colour which? nitrogen
269. Bleaching powder contains chlorine
275. Which of the following atmospheric gases is in highest percentage? nitrogen
276. Gas used to harden oils in the preparation of vanaspathi hydrogen
277. The term PVC used in the plastic industry stans for polyvinyl carbonate
278. The boiling point of water on the Kelvin scale 373?C
279. For drinking purpose water can be purified by chlorination
280. The hardest variety of carbon is diamond
281. The poisonous gas produced by a Motor car carbonmonoxide
282. What is the “lead” of a lead pencil made of ? graphite
283. The tendency of similar molecules to stick together is known as cohesion
284. Hydrogen bomb is based on the principle of nuclear fission
285. Estimation of nitrogen is done by kjeldahl’s method
286. 95% alcohol is known as rectified spirit
287. Bleaching action of chlorine is by decomposition
291. Which one of the following gases is readily soluble in water at room temperature? ammonia
292. Which one of the following undergoes polymerization to form a plastic? ethylene
293. Which by product is obtained in the manufacture of soap from oils? glycerine
294. Which one of the following combinations would liberate carbon dioxide gas? calcium carbonate + dilute hydrochloric acid
295. Which one of the following properties is not a characteristic of a metal? it is good conductor of heat
296. Ethane and ethylene may be distinguished by using a few drops of bromine water
297. The percentage of oxygen present in air by volume is 20.5%
298. Which one of the following requires a solvent other than water to dissolve it? sulphur
299. The filter beds at water works remove most of the suspended solids
300. The lowest percentage of carbon is present in steel
351. Basic principle of the hydrogen bomb is nuclear fusion
352. The charge on a proton is 16?109C
353. The two isotopes of chlorine are 17CI37and17CI37; both of them contain
all of these
354. The metal which is found in liquid state at room temperature is Mercury
355. The major constituent of Super-phosphate of lime is Phosphorous
356. Electrovalent bond is formed between two electronegative elements
357. Of the following substances the one which can turn blue litmus paper to red is CH3COOH
358. The element having only proton in the nucleus is Hydrogen
359. pH of water 7
360. The sides of a match box contains red phosphorus
361. The acid which etches glass is hydrofluoric acid
362. Helium is preferred to hydrogen is airships because it does no form explosive mixture with air
363. Which of the following has the smell of garlic? phosphorus chloride
364. A common nitrogenous fertilizer is urea
365. Which element is a metalloid in the following? arsenic
366. Highest ionization energies are found in halogens
367. The bonds present in acetylene are 2pi, 3 sigma bonds
368. When methyl orange is added to hydrochloric acid, it takes the colour pink
369. The most abundantly found gas in atmosphere is nitrogen
370. Spirit is methyl alcohol
371. Among the following a fertilizer is calcium sulphate
372. In the modern periodic table, elements are classified on the basis of atomic number
373. Why is tungsten used in electric bulbs? it is cheaper than other metals
374. Radon is inert gas
375. ……. is a synthetic polymer PVC
376. The element that shows maximum catenation is carbon
377. In covalent solids…. occupy the lattice positions electrons
378. Ice is…… compound covalent
379. When silver tarnishes in air it turns black. This indicates that there is ……. in air. hydrogen sulphide
380. What is the black board chalk made of? lime
381. The substance that is not polymer is glucose
382. The main active ingredient of tea and coffee is caffeine
383. Riboflavin is a/an vitamin
384. The vitamin responsible for blood clotting is K
385. The most abundantly found metal in the human body is calcium
386. Steel contains 0.1 to 2% carbon
387. Morphine is a/an stimulant
388. Air contains what percentage of oxygen? 21
389. An atom of iron is …… times as heavy as an atom of hydrogen 238
390. Which is the gas emitted from the road vehicles causing pollution? carbon monoxide
391. Which of the following compounds is responsible for acid rain? Sulphur dioxide
392. Element discovered alter Mendeleef’s tabulation is germanium
393. The food which gives an athelete instant energy is glucose
394. Which is an example of an antibiotic? Streptomycin
395. Which of the following gases is known as laughing gas? Nitrous oxide
396. The acid associated with the soaps is fatty acid
397. The substance used in making hairdye is silver nitrate
398. The substance present in spurious liquors causing blindness is
methanol
399. The number of neutrons in 13AI27 is 14
400. Avagadro’s law is applicable to gases
401. Temporary hardness of water is due to bicarbonates of Ca & Mg
402. An element with atomic number 7 will contain 7 electrons & 7 protons
403. Paracetamol is analgesic
404. Chemical equilibrium is noted in the reaction reversible
405. Hypo, used in photography, is sodium thiosulphate
406. Which will explode on detonation in the dry Sodium
407. In fat, the functional group is ester
408. Which among the following has the highest fuel value? fat
409. Which of the following has maximum electronegativity? S
410. In an endothermic reaction washing soda
411. Sodium bicarbonate is called baking soda
412. The chemical equation that correctly represents the reaction between hydrogen and oxygen is 2H2+O2?2H2O
413. Which is neither an element nor a compound? air
414. Which of the following substances is used for preservation of food grains? sodium benzoate
415. The water that does not produce good lather with soap is called hard water
416.Tha acid used in a car battery is sulphuric acid
417. Which of the following gases makes the major proportion of air? nitrogen
418. The growing plants need which of the following elements in largest quantity? nitrogen
419. Sodium thiosulphate is called hypo
420. Formalin is used as preservative
421. Among the following an anaesthetic is chloroform
422. Which one of the following is an example of a carcinogenic compound? Chloroform
423. The main constituent of glass is
calcium silicate
424. The rich source of nicotin is tobacco
425. The ozone layer in the upper atmosphere is formed due to the following reaction oxygen and UV-rays
426. The relative mass of an electrons is
427. Maximum 14 electrons are accommodated in sub shell f
428. Dynamite was discovered by Alfred Nobel
429. Chemically cane sugar is Sucrose
430. For the manufacture of cement, which of the following is used in the largest quantity? Calcium oxide
431. Bleaching powder has Chlorine
432. Iodised Salt is a mixture of common salt with Potassium iodide
433. Nitrogen is found in organic
substance proteins
434. Plant and animal wastes on biodegradation give Bio gas
435. Biogas mainly contains Methane
436. Which metal is present in Vitamin B12? Cobalt
437. Chalk is calcium carbonate
438. Metals lose electrons
439. The reagent that bleaches the colour of the fabric is SO3
440. Nicotine is Alkaloid
441. Oxidation involves loss of electrons
442. During the fermentation of sugars, the enzyme which converts glucose into ethyl alcohol is zymase
443. Pick the odd one out DDT
444. Gun powder is a mixture of charcoal, sulphur and potassium nitrate
445. Which is the non-inflammable organic compound CCI4
446. The substance that is not polymeric is Glucose
447. ……. is used as an anaesthetic Nitrous oxide
448. Which is used as a Lubricant? Graphite
449. Protein is made up of Amino acid
450. Which of the following is ka carbohydrate? Cane-sugar
The main raw material used in match industry is Potassium chlorate
452. An antifreeze used in automobile radiators is Glycal
453. Which one of the following is a cation?
454. Radioactive isotope of hydrogen is 1H3
455. Monozite is the principal source of Thorium
456. Vinegar is acetic acid
457. Which of the following was the first organic compound to be synthesized in a laboratory? Urea
458. Rat poison contains white phosphorous
459. For instant energy, atheletes that cure Glucose
460. Dry ice is solid carbon dioxide
461. Antacide found in medicines that cure stomach ache
462. Which of the following is Laxative? Epsom
463. According to Mendeleef’s periodic law properties of element are periodic functions of their
464. Which of the following elements exhibit allotraphy? Tin
465. Acetyl Salicylic acid is commonly used as Pain killer
466. Which one of the following is a mixture? Seawater
467. Hypo used in photography is chemically Sodium thiosulphate
468. Natural Rubber us a polymer of Isoprene
469. LPG contains a mixture of Butane + Propane
470. Duralumin is used for making aircraft components
471. DDT is an insecticide
472. Amalgams always contain Mercury
473. Who was the first world surgeon to conduct successful heart transplant? Dr. Christian Bernard
474. Which of the following is usually not an air pollutant? Hydrocarbon
475. Which gas is easily liquefied? Cl2
476. The alloy of copper which does not contain zinc is Bronze
477. What is DDT? Insecticide
478. Proteins are made up of Amino acids
479. Biogas contains mainly? Methane
480. Hypo is sodium thiosulphate
481. The idea that the arrangement of structure of an atom was like a miniature solar system, was suggested by Rutherford
482. White paint contains zinc oxide
483. Which one of the following is a green house gas? Fluorine
484. Which one of the following is a green house gas? Carbon di oxide
485. Reduction is addition of hydrogen
486. The red colour of ruby is due to chromium oxide
487. Diamond and graphite are different forms carbon
488. The number of elements present in the lanthanide series is 14
489. The pH of dilute acetic acid is 2. It will increase on the addition of aqueous anmonia
490. The acid used as hypnotic agent is barbitutic acid
491. For the manufacture of cement, which is used in the largest quantity? Silica
492. Drinking soda is acidic
493. The compound that contains maximum amount of nitrogen is urea
494. During dehydration, the substance that is lost by the body is Sodium chloride
495. Carborundum is used in grinding glass
496. The compound used in smoke screen is calcium phosphate
497. Which one of the following elements has the same atomic number and mass number? Hydrogen
498. The boll metal contains Cu and Sn
499. Blue vitriol is CuSO4 5H2O
500. Oxidation involves Loss of electron
501. An aqueous solution of pH zero is none of the above
502. Economical method of separation of essential oils from nature sources is possible by fractional distillation
503. Dilantin sodium is an anti-inflammatory
504. One of the following is a heart drug Dizioxin
505. Nylon 66 is prepared from hexamethylene diamine and adipic acid
506. The formula of tetra chlorodiamine platinum (iv) is [Pt(NH3) 2 ]CI 4
507. The co-ordination number of atoms in BCC lattice is 6
508. Which one of the following has the highest boiling point? 0.1mNaCl
509. Which has the highest pH? 1m NH4OH
510. Non-stick kitchen ware is coated with Teflon
512. What is the composition of baking powder? NaHCO3 Tartaric acid
513. what is THERAPEUTICS? science of art of heating
514. Identify the manmade element Californium
515. Which of the following is not an inert gas? Freon
516. The metal present in vitamin B-12 is Cobalt
517. LPG contains Methane, Ethane and Hexane
518. Natural rubber is a polymer of Isoprene
519. A photographic plate uses Silver bromide
520. The sour taste of curd is due to lactic acid
521. Ornament Gold is 22 carat
522. Laughing gas is nitrous oxide
523. pethidine is an analgetic
524. Law of mass action was given by Ostwald
525. Oxidation is addition of hydrozen
526.Terylene is Polyester
527. The gas responsible for fruit ripening is Ethylene
528. Which of the following is used as a preservative of food articles? Sodium benzoate
529. The gas that should not be used for extinguishing fire is O2
531. Which gas leaked in Bhopal tragedy? Methyl iso-cyanide
532. The important substance used in Vulcanisation of rubber is sulphur
534. Gun metal is an alloy of Cu, Zn and Sn
535. The chemical name of Calomel is Mercurous chloride
536. Oil of vitriol is Sulphuric acid
537. Which of the following is an ester? Coconut oil
538. To demonstrate the movement of water, which of the following solutions used? Eosin
539. Some of the elements in enzymes function as co-enzymes
540. One of the following is used for artificial ripening of banana: Ethylene
541. Acid rain that affects plants and animals in mainly due to this gas ABA
542. Kerosene oil is an example of Mineral oil
543. Which is the substance that is not present automobile exhausts? oxides of nitrogen
544. Pencil lead is made of Graphite
545. Temporary hardness of water is due to the presence of bicarbonates of Ca and Mg
546. Vitamin B1 is called Thiamine
548. Rayon is artificial silt
549. The important buffers present in the blood is NaH2PO4/Na2H PO4
550. Which is true of the following? Elements can be solids or liquids or gases
551. Phytochrome is Chromopeptide
552. Gobar gas is mixure of CH4CO and H2
553. Which chemical is used for preserving the biological specimens in the laboratories? Formaldehyde
554. Quarts is Calcium silicate
555. Which is the first man made element? TC
556. What is not correct about colloids? their stability is increased by adding an electrolyte
557. The raw material for the manufacture of paper is Cellulose
558. The compound used to prepare Bakelite is Phenol
559. Acetyl Salycilic acid is used as Pain killer
560. The highest known atomic number is 108
562. The peak of Lothar Meyer Atomic Volume curve is occupied by alkali metals
563. When calcium carbide is treated with cold water, the gas evolved is Acetylene
564. The element used in valcanising rubber is Sulphur
565. Urea is very good fertilizer because the nitrogen content is more
567. Which one of the following is an ionic crystal? salt
568. The less electronegative element in the halogen family is Iodine
569. In the vapour state, phosphorus exists as P4
570. Ammonia is a base
571. Rectified spirit is 95% ethanol
572. Many organic compounds have the same molecular formula and they differ in the physical and chemical properties. This phenomenon is called as Isomerism
573. The chemical name of baking soda is Sodium Chloride
574. Industrially used process for the conversion of Ethylene to polyethylene is known as Polymerisation
575. Epsom salt is MgSO4 7H2O
576. When an acid reacts with an alkali, the following change is observed? Heat is evolved
577. The gas evolved during the fermentation of sugar solution is methane
578. Elements which form often coloured compounds are transition elements
579. Which one of the following does not exhibit allotropy? Neen
580. The metal used in air craft structure is Duralumin
581. Bleaching powder is used mostly for sterilizing water
582. DDT is a/an insecticide
583. Neutron was discovered by Chadwick
584. Gas which gives dense white fumer with ammonia is Hydrogen chloride
585. The radioactive element amont the following is radium
586. Bone ash is calcium phosphate
587. one gram mole of all gases at NTP occupies 22.4 lit.
589. Which of the following turns blue litmus red? Acetic acid
591. The best ductile metals are gold, silver
594. The gas used for artificial ripening of green fruits is Ethylene
595. An acid converts blue litmus into blue
596. Acetylene on polymerization gives Polythene
597. Which enzyme converts glucose and fructose into ethyl alcohol and CO2? Zymase
598. The pyrolusite ore contains Mn
599. When an acidified solution of ferrous ammonium sulphate is treated with KMnO4 solution, the ion which is oxidized is Fe2+
600. Which of the following is a naturally occurring polymer? Protein
601. According to Arrhenius concept, base is a substance which accepts a lone pair of electrons
604. Which of the following is the correct order of calorific values of fuel? Hydrogen > Petrol > Wood

Botany

Botany

1. Which one of the following is a green house gas? Carbon dioxide
2. The tallest living tree is Sequoia
3. Which on of the following plants is biennial? Carrot
4. Sea weeds are an important source of iodine
5. Polio is caused by virus
6. “Ozone” as such protects the earth from ultraviolet sunrays
7. The climatic changes, soil erosion and decreased rainfall is due to deforestation
8. AGHARK is a quality assurance for agricultural products
9. Refrigeration is a process which slows down the bacterial growth
10. The blue-green algae are photoautotrophs
11. Which of the following acts as a coenzyme? Zn++
12. The phenotypic ratio of monohybrid cross is 3:1
13. Smallest measuring unit in cytology is angstrom
14. It is believed that live evolved in its early stage under oxygen-free condition. Which of the following organisms might have been able to survive in that environment? obligate anaerobic bacteria
15. Sexual reproduction is absent in which of the group of fungi mentioned below? Deuteromycetes
16. One of the characteristics that differentiates prokaryotes from eukaryotes is Membrane-bound organelles
17. The most common method of vegetative reproduction in usnea is soredia
18. Which of the fungi mentioned below is employed as a genetic tool? Neurospora
19. Heterotrichous habit is exhibited by Ectocarpus
20. Photosynthesis cannot take place in ultraviolet light
22. What is the cause for deforestation? rapid explosion of human and live stock population
23. How soil get eroded? by floods and rains
24. The shape of Human Immuno deficiency Virus (HIV) is spherical in shape
26. Polyploidy is most common in plant kingdom
27. In photosynthesis, the light reaction is known as hill reaction and the dark reaction is known as Blackman reaction
28. DNA structure was first described by Watson and Crick
29. What is an example for cymose in florescence? Crotalaria
30. Rice is a stape food of people of India. In the milling process, polishing is the final process and the polished rice is rich in starch
31. The ratio 9:3:3:1 represents a ratio of dihybrid
32. Which one of the following is correctly matched? Manihot – Grain
33. Gnetum is a climber
34. Largest living tree on earth is sequoia
35. Protonema appears in the life cycle of Riccia
36. Sugar is obtained from all these
37. When a plat cell is placed in a sugar solution …. takes place. osmosis
38. The kinds of ribose nucleic acid present in any plant cell will be 2
39. Vernation means the arrangement of leaf outside the bud
40. In plants, energy is produced during photosynthesis
41. The yellowing of leaf is caused by the deficiency of iron
42. Identify the correct sequence of evolution in plants: Thallophyte – Bryophyte – Pteridophyte-Gymnosperms
43. The vascular bundles arranged in a cycas petiole is inverted omega (U) shaped
44. Which one of these is correctly matched? Paddy – Blast disease
45. When the soil is rich in organic debris, it is known as Humus soil
46. A plant growing inside another plant of different species symbiotically is called Endophyte
47. “Survival of the fittest” was proposed in his theory of evolution by Darwin
48. In rice polish which is left as a residue none of the above
49. This pteridophyte produces two kinds of spores selaginella
50. Lepidodendron is a fossil which represents stem
51. These cells are loosely arranged in a plant body parenchyma
52. Maximum rate of photosynthesis occurs in white light
53. Resupination is a characteristic feature to the flowers of this family
orchidaceae
54. Gemma cup is present in Riccia
55. Which one is correctly matched? Bengal gram-shrub
56. How many types of cell division are there in plant cells? 3
57. Flowers emit fragrance to attract insects
58. Recently pattern right was given to which plant in America Turmeric
59. Reduction in chromosome number occurs after Meiosis
60. The male cone of cyas consists Microsporangia
61. Botanical name of paddy is Oryza sativa
62. The male filament of oedo gonium is known as Nannandrium
63. Guard cells in the stomata help in transpiration
64. Syngenesis means union of filaments
65. Identify the correct sequence of protein synthesis Messenger RNA – Polyribosomes – aminoacid+tRNA-Polypetide
66. The study of individual plant throughout their life – history in relation to the environment is called synecology
67. Which one of the following is correctly matched? Jute-phloem fibre
68. Fern phrothallus is Gametophyte
69. What is the correct sequence of the life cycle of fern? Zygote-Sporophyte-Spore-Gametophyte
72. Which of the following lights is necessary for photosynthesis? red
73. The fruit of Tomato belongs to the type? berry
74. The edible part of Cauliflower is flower
75. The genetic material of a cell resides in DNA
76. An ecosystem has two components, namely biotic and abiotic
77. Development of a sporophyte directly from the sporophytic tissue is called double fertilization
78. Root hairs absorb water from the soil on account of difference is osmotic concentration
79. Pollination by birds is known as ornithophily
80. Autotrophs in an ecosystem are called producers
81. A dye is prepared from indigofera
82. What is the phenotypic ratio of complementary genes in pea? 9:7
83. Thymidine is a nitrogenous base found in DNA
85. The first effective vaccine against polio was prepared by Jone E.Salk
86. Which among the following is a non photosynthetic pigment? chlorophyll – a
87. Unit of classification is family
88. Plant that grow in saline water are called halophytes
89. Diatomaceous earth is a deposit of organisms of bacillariophyceae
90. The physiological phenomenon considered as a “necessary evil” in plants is transpiration
91. The type of phyllotaxy in caltropis is opposite decussate
92. Franks produces root nodules in casuarinas
93. Red tides are caused by red algae
94. The development of fruit without fertilization is known as parthenocarpy
95. The agent that carries informantion from DNA to RNA is m-RNA
96. To induce callus which one of the following chemicals is necessary? NAA
97. Arachis hypogaea (groundnut) belongs to the family Musaceae
98. A definite number of cells arranged in a specific manner in an algal colony is known as thallus
99. Which of the groups of plants mentioned below consists of phycobiont and mycobiont living together as an unit? lichens
100. Which of the scientists mentioned below for the first time, observed and described bacteria?
Anton Van Leewenhoek
101. The cambium present within a vascular bundle is known interfascicular cambium
102. The outermost layers of rice grain endosperm rich in proteins, vitamins and minerals are known as Aleurone layers
103. Syngenesious anther is an important characteristic feature of
104. Heterospory leading to the establishment of seed habit is observed in selaginella
105. Which of the monocots mentioned below shows anomalous secondary thickening? Asparagus
106. The botanical name for neem is Azadirachta indica
107. Meristeles are usually present is Ferns
108. Winged pollen grains are present in Pinus
109. Aprogeotropic and coral-like roots are produced in taxus
110. What drug is experimented in the treatment of AIDS? AZT
111. Lysosomes are known as Suicide bags
112. The algae used by calvin and his co-workers in elucidating the pathway of carbon in photosynthesis is Chlorella
113. Heredity characters are carried to the next generation by chromosome
114. Nobel prize for the study of the structure of DNA was won by Watson and Crick
115. Global warming is due to the release of this gas carbon dioxide
116. The secret behind Mendel’s success in his experiments lies in this there are 7 pairs of strikingly contrasting characters in the garden peaplant
117. This is used as a biofertilizer Azolla
119. Choose the appropriate one connected with heterospory ophioglossum, marsilea
120. Which one of the following is responsible for guttation in Ruhr leaf? transpiration
121. The bacterium Escherichia coli is present in the colon of human beings
122. Turpentine is obtained from pinus
123. The metal ion involved in stomatal regulations is potassium
124. Which one of the following is concerned with the production of ATP molecules? cisternae
126. The ratio 3:1 is obtained in monohybrid cross
128. Which of the following is not correctly matched? Ethylene – Fruit ripening
129. Coralloid roots are found in cycas
130. Pulses contain large amount of proteins
131. Which one is a xerophyte? Ceratophyllum
132. Which of the following diseases is not caused by bacteria? influenza
133.Which one of the following is correctly matched? Iwanoski-Discovery of virus
134. Gymnosperms are open seeded plants
135. Reduction division is Meiosis
136. The female sex organ of polytrichum is Archegonium
137. DNA mode was first proposed by Watson and Crick
139. Mendel did his hybridization experiments in this plant Pea plant
140. The sun’s energy is fixed in the world by green plants
141. Fixation of nitrogen in the soil is done by bacteria
142. Plasmodium belong to this group protozoa
143. Genes are located on chromosomes
144. Select the correct order in the life-cycle of a bryophyte Sporophyte-Spores-Fertilization-Gametophyte
145. Which one of the following is correctly matched? Tetanus-virus
146. The botanical name of Bengal gram is Cicer arietnum
147. Select the correct order of stages in mitosis: Prophase, anaphase, Metaphase, Telophase
148. A pure breeding dwarf pea plant (tt) on hybridization with a pure breeding tall plant (TT ) will produce dwarf and tall plants in the ratio (in F2 generation) of 1:3
149. The male sex organ in chara is called as Globule
150. Bacteria were first discovered by Anton Van Leeuvenhoek
151. Which one of the following is correctly matched? Polytrichum-Algae
152. Which one of the following tissues conducts food material in plants? phloem
153. Penicillin is a/an antibiotic
154. Polio is caused by virus
155. The energy needed by the living organism is ultimately obtained from
sum
156. In plants, water is conducted by xylem
157. Peristomes are present in
polytrichum
158. The weed which reached India as a contaminant of wheat imported unfrt PL 480 scheme is parthenium
159. Polio is caused by a virus
160. Tobacco contains a poisonous substance called nicotine
161. Palaeobotany deals with the study of Fossil plants
162. The work ‘Biosphere’ means total assembly of all living organisms
163. Microbial world was discovered is the year 1673
164. Gametophtyes are all these
165. Presence of a cambium indicates open vascular bundle
166. The phyllotaxy of Gnetum is opposite
168. The sperm in cycas is top-shaped and multiciliate
169. Circinate vernation of leaves is a typical character of ferms
170. All fungi are always heterotrophs
171. Why blue green algae are called cyano bacteria? because they are prokaryotic
172. The gymnosperms resemble angiosperms in having presence of ovules
173. The disease caused by the fungus colletotrichum falcatum is known as red rot
174. Dendrochronology is the study of age of a tree with the help of annual rings
175. Clove is obtained from which of the plants parts given below? flower buds
177. Which of the algae given below grows in sewage ponds? volvox
178. Which of the plant groups mentioned below are popularly known as amphibious of plant kingdom? bryophytes
179. DNA double helical structure was described for the first time by Watson and Crick
180. Cataclytically active enzyme is
called apoenzyme
181. Water droplets at the tip of the leaf are due to guttation
183. The age of a tree can be determined by counting the annual growth rings
184. The name “Traveller’s palm” refers to revenala madagas cariensis
185. Phyllode is seen in the plant Acacia melanoxylon
186. Polyploids can be artificially induced by colchicines
187. Parthenocarpy can be induced by IAA
188. Raphanobrassica was discovered by Karpachanko
189. When FADH2 is oxidized, the following number of ATP is produced 2
190. Half leaf experiment proves the essentiality of CO2
191. The universal Co2 acceptor molecule is called PEP
192. In anoxygenic photosynthesis, which of the following takes part as electron donors? H2S
193. Velamen root is found in vanda
194. Rosewood is obtained from dalbergia latifolia
195. Penicillin was invented by A.Fleming
196. Spirulina which is a source of SCP is a blue green algae
197. Chlorophyll is formed in the presence of magnesium
198. Hormone involved in phototropism is Auxin
199. Father of genetic is Gregor Mendel
200. The main function of RNA is protein synthesis
201. An example of a Hesperidium is Citrus
202. Which of these is an antibiotic?
aureomycin
203. The number of dry plants in the herbarin found in the Indian botanical garden at kolkata is about 1 million
204. Mycoses are diseases caused by fungi
205. Which one of the following is not a correct pair in relation to function? Golgi complex-breakdown of complex molecules
206. The parasitic algae is cephaleuros
207. In which plant are scleroids abundant? none of these
208. The fruiting body namely, cleistothecium is formed in puccinia
209. If the genetic name of the fossil
plant ends with “dendron” or “xylon” it denotes the stem of the fossil
210. Sewage treatment is carried out with the help of bacteria
211. “Ikebana” pertains to floral arrangement
212. The bacterium which lives in the human intestine is E. coli
213. The first to isolate a plant virus is W.M. Stanley
214. National Botanical Research institute is situated at Coimbatore
215. In plants, the radial transport of food, water and mineral salts is performed by secondary phloem
216. Grafting cannot be practiced in monocotyledonous plants because they do not have cambium
217. Mycology is the study of fungi
218. The group of plants containing algal and fungal partners in association are called Thallophytes
219. The largest cell found in plant kingdom is that of Acetabularia
220. Electron microscope was invented by Knoll and Ruska
221. Apple is false fruit
222. Genes are located on the chromosomes in a linear manner
223. Soil erosion leads to loss of vegetation
224. The plant used by Mendel in his early experiments was Pea plant
225. The medicine prepared by genetic exchange in bacteria is Insulin
226. Penicillin was discovered by Alexander Fleming
227. The leaves with sori are called as sporophylls
228. Saprophytic organism is fungi
229. The plant used by Mendel for his research was pea plant
232. Which one of the following statements is wrong about meiosis? it happens in the meristematic region
235. Which one of the following plants is used in the treatment of Jaundice? Eclipta
236. Which of the following is wrongly matched? Streptococcus lactis-Vinegar production
237. The smallest angiosperm is wolfia
238. Identify the correct sequence of following Glycolysis, Krebs’ cycle, Electron transport ATP synthesis
239. Which one of the following is correctly matched? Ribosomes-protein synthesis
240. The stiffness of paddy straw is due to silica
241. Which of the following plants is endemic? Ginkgo
242. The wood is made of primary xylem
244. “Berry” fruit is found in Tomato
245. DNA structure was discovered by Watson and crick
246. The growing of plants under soilless condition is called? hydrophonics
247. Spore is a asexual reproductive cell
248. Quickly available respiratory substrate is starch
249. In nature, ammonification takes place in ditch
250. What kind of plant is an ‘alga’? chlorophyllous
251. Ganong’s photometer is used in the study of transpiration
252. Coconut is dispersed in nature by water
253. Pillar roots of Banyan help in the support of the branches
254. The organic compounds that contain nitrogen is protein
255. Which one of the following is a climax forest? Thorn forest
256. Red colour of riped tomato is due to chromatophore
257. Cultivation of trees and vegetables is Arboriculture
258. Jaya is variety of Cotton
259. Absorption of water by plants takes place when the sun shines
260. Which are the most important element necessary for plant growth? Oxygen, Iron, Phosphorus
261. Osmosis is synonymous with none of these
262. What is the first stable product of photosynthesis? sugar
263. The water absorbed by the plant moves through xylem tissues
264. Ganong’s photometer is used to measure the loss of water by plants
265. What does phloem tissue have? sieve elements
266. Piliferous layer of root is produced from epidermal cells
267. Endodermis is found as a single layer of cells forming the outermost layer of the stele
268. The fascicular cambium is present in the stem of sorghum
269. Dixon and jolly formulated their theory on the ascent of sap in plants based on union of water molecules
270. Find out the only plant among the four give below. Which is not a xerophyte? Euphorbia tirucally
271. Which do you find the largest number of Eucalyptus species? india
280.The electron transport chain is a group of molecules located in the
outer membrane of mitochondria
281. What is penicillium? fungus
282. Inside a seed, the plant remains in a/an dormant state
283. Plasmids are used as vectors in gene transfer. They are present in certain bacteria
284. Transgenic plants and animals can be produced through genetic engineering
285. Guttation is a process in plants by which excess of water is removed as water drops
286. Ability to fix atmospheric nitrogen is found in some blue green algae
287. Opposite decussate phyllotaxy is seen in Calotropis
288. The natural system of classification was postulated by Bentham and hooker
289. In plants, energy is produced during the process of photosynthesis
290. In which of the following the pollen grains are lilberated as clouds of yellow powder and also called “Sulphur shower”? Pinus
291. In Botany, the Latin names are used because in whole world there would be only on name for one plant
292. The flowers are variously coloured to attract insects
293. Agar-Agar is derived from Gelidium
294. The plant which is used as medicine for jaundice is phyllanthus
295. The most commonly used higher plant vector for gene transfer is Ti plasmid
296. Genetic material kof virus is/are DNA (or) RNA
297. Primary organs of photosynthesis are leaves
298. The abundance of blue-green algae in paddy fields results in saving on potash
299. Sessile leaves are seen in Calotropis
300. Angiosperms are spermatophytes
301. The green leaves performing photosynthesis are know as foliage leaves
302. Mango is an example for tree
303. Mitosis and Meiosis are absent in bacteria
304. Cotton fibres are obtained from cotton fruits
305. Bacteria which are spherical in shape are known as coccus
306. Viruses are in between non-living and living organisms
307. Thallophytes used as food include algae and fungi
308. The structure of DNA was discovered by Watson and crick
309. Which of the following flowing is unisexual? Bottle guard
310. The substrate most important for genetic engineering is Nucleous
311. Which of the following is a prokaryote? Blue – green algae
312. With what technology do you associate ’callus’ with? pollen analysis
313. Penicillin was discovered by Alexandedr Flemming
314. Which of the following is a bacterial disease? Tuberculosis
315. Which one of the following is a woody climber? Gnetum
317. Which one of the following is not a pulse? Chloris barbata
318. E.coli is living in the human intestine
319. Which one of the following is wrong? Man is not responsible for the destruction of natural resource
320. Direct cell division is otherwise known as Amitosis
321. Which medicine is used in the treatment of AIDS? Azidothymidine
323. Founder of Binomial nomenclature is Carl Linnaeus
324. The roots coverd with fungal hyphens are Mycorrhizal roots
326. We should not sleep under the tree during night because the trees release more carbon dioxide
327. Which of the following is used in the preparation of digestive tablets? yeasts
328. The bacterial action in milk is acidic
329. Streptomycin is produced by fungi
330. One of the following is called the vascular cryptogams none of these
331. Disease causing bacteria a called pathogenic
332. Ergot is obtained froms claviceps purpurea
333. after development ovule forms seed
334. Which of the following can be recyled metal
335. The mechanism of heredity was explained first by Mendel
336. Viruses are inert outside host cell
339. The genetic material of a cell resides in DNA
340. Which part of cinchona is used for malaria cure? bark
341. Arachis hypogea is the binomial name of groundnut
342. Antibiotic penicillin is obtained from fungi
345. A bacteriophage is a virus that attacks bacteria and destroy them
346. Ribosomes in a cell play a significant role in protein synthesis
347. Baker’s yeast is saccharomyces cerevisae
348. The tallest tree occurs in gymnosperms
349. The poisonous substance that is present is tobacco is nicotine
350. Which of the following is used for culture medium of bacterial growth? Agar-agar
351. one of the following is the simplest land plant Bryophytes
352. Bacteria generally multiply by binary fission
353. Agaar- agar is obtained from gelidium
354. Which of th following grows on wet bread? yeasts
355. Nitrogen fixation is done by blue-green algae
356. Which bacteria produce vinegar in sugar solution? acetobacter aceti
357. Penicillin was discovered by Alexander Fleming
358. Yeasts help in the production of alcohol
359. Many pulses are obtained from
plants of the family Fabaceae
360. Emasculation is removal of stamens
361. “Donann equilibrium”, a theory which explains the physiological phenomenon is called mineral absorption
362. Bacterial action changes dead leaves into humus
363. Which of the following is not a fruit? Potato
364. Litmus is obtained from an algae
365. ‘Gemma Cup’ is found in Marchantia
366. The plants which include underclass hepaticopsida are generally called as liver worts
367. Which of the following genera possesses long shoots and dwarf shoots? cycas
368. Each virus is made up of nucleic acid and protein
369. Water of coconut is degenerated liquid endosperm
370. A herbarium is a centre for the preservation of dried specimen of plants
371. Agar-agar is obtained from Geledium
372. Golgi bodies of plant cells are also called as Dictyosoms
373. The nucleic acids of virus must be Either DNA (or) RNA
374. Pollinia are found in one of the following families Apocyanacease
375. The system of binomial nomenclature was proposed by Linnaeous
377. Bacteria which convert atmospheric nitrogen into nitrates are denitrifying bacteria
378. Parallel venation is found in paddy
379. Hard fibres are generally got from tropical dicot plants
380. Cell membrane fo plant cells are also called as plasma membrane
381. First land inhabiting plants are Gymnosperms
382. The seed germination type found in pinus is hypogeal
383. The process by which plants lose water by liquid status is transpiration
384. The root in mangrove tree is respiratory
385. Mango is a drupe
386. Chlorosis is linked with chlorophyll
387. Paddy is a caryopsis
388. Plant viruses are named as phytophage
389. TMV stands for Tobacco mosaic virus
390. The bacterium found in the large intestine is E.com
391. The bacterium present in the root nodule of leguminous plant is Rhizobium
392. Anaerobic decomposition of protoin is called ammonification
393. The father of Genetics is Mendel
394. The genotypic ratio of monohybrid ratio is 1:2:1
395. The double helix model of DNA was proposed by Watson and crick
396. Common cold is viral disease
397. W.M. Stanley got Nobel Prize for virus
398. Apical dominance in higher plants is due to hormones
400. The pollen grains of flowers pollinated by insects are rough and sticky
401. Soyabean contains a high degrees of proteins
402. The age of a tree can be determined by counting the growth rings of its stem
404. Ground becomes slippery during the rainy season due to green algae
405. Which one of the following is a useful functional association between fungi and the roots of higher plants?mycorrhiza
406. Carbon is available to plants as carbon dioxide
407. Photosynthesis is a bio-chemical process for the transfer of solar energy to food chain cycle
408. The fruit in member of poaceae is Caryopsis
409. The function of flower is reproduction
410. Penicillium is generally known as Fungus
411. The biggest herbarium of our country is located in Kolkata
412. Polytrichum plants belong to bryophyte
413. Which of the following flowers is sessible? mustard
414. Adiantum sporophytic plants have chromosome type of diploid
415. In which of the following is xerophytic present? calotropis
416. The study of inflorescence, flowers, fruits and seeds is known as reproductive morphology
417. In insectivorous plants which of the following elements is absenst or deficent Nitrogen
418. Viruses chemically called as nucleoproteins
419. Penicillin was discovered by Alexander Fleming
420. The metal present in chlorophyll is magnesium
421. Based on the cellular type the algae chlorella belongs to Both (A) and (B)
422. Three major types of sexual reproduction found in algae may be isogamy, anisogamy and oogamy
423. Those algae which grow in hot spring at about 85?C temperature are called as
424. To which of the following families do all pulses belong? Sporophytic phase
425. The evergreen plant body of gymnosperms is sporophytic phase
426. The ovules of an ovary are not naked in which of the following groups? angiosperms
427. Gigantism is a result of Auto-polyploidy
428. The most important purpose of insects to visit a flower is to collect honey
429. The inflorescence axis in banana is used to remove kidney stones
430. Who first discovered the penicillin? Alexanderd Fleming
431. Epiphytes are plants which depend an other plants only for shelter
432. Who has discovered the cell? Robert Hook
433. Which one of the following plants is an example of herb?Hibiscus
434. The sharp and pointed outgrowth present on the stem of rose are called spines
435. ‘AIDS’ is caused by virus
436. Streptomycinis produced from Streptomyces griseus
437. Iodine is obtained from Gelidium
438. The broad leaves of tall trees absorb rain clouds
439. Diffusion means the movement of molecules fro a region of greater concentration to lesser concentration
440. In some plants fruit formation takes place without fertilization which is called as parthenocarpy
441. Centrl Rice Research Institute is in Cuttack
442. The bacterium which has flagella all over the body is called as peritrichous
443. Moistur absorbing roots are seen in vandal
444. Secondary growth (or) width enlargement is usually absent in Monocotyledons
445. The number of plant species described on our earth is overd 4,00,000
446. The first person to see a cell under microsecope was Hooke
447. The drug chloromycetin is used for which disease?Tuberculosis
448. Leprosy is caused by bacteria
449. The study of external form of a plant is known as Morphology
450. A group of cells similar in structure and function is tissue
451. Those flowers which have both male and female reproductive parts are called unisexual
452. The other nama of the plant taxonomy is systematic botany
453. Plants takes nitrogen in the form of nitrates
454. Edible fungi are Agaricus
455. One of the following is useful for cheese making penicillium
456. Waterblooms are produced by algae
457. Viruses are all of these
458. Bacteria reproduce mostly asexually
459. Atmospheric CO2 can be reduced by the process of photosynthesis
460. which of the following cannot grow indeserts of Rajasthan? Banana
461. Bacteria are both (A) and (B)
462. Soil conservation is the process where soil is protected against erosion
463. Phytology is the study of algae
464. The largest flower is Rafflesia
465. The molecule with high energy phosphate bond in the cell is ATP
466. The root nodules containing Rhizobia occur in Fabaceae
467. Pasteurization of milk destroys its pathogenic bacteria
468. Atmospheric nitrogen is fixed in leguminous roots by bacteria
469.Gymnosperms are characterized by lacking ovaries
470. In food making industry the product of yeast culture utilised is
ethyl alcohol
471. One of the following is responsible for smut disease ustilago
472. Sexual reproduction is about in blue-green algae
473. Algin is obtained from brown algae
474. The virus which attacks E.coli is termed coliphage
475. Laminaria is an important source of iodine
476. ‘Pond silk’ is the common name of spirogyra
477. Pneumonia is caused by one of the following bacteria
478. Cotton fibre is obtained from the fruit
479. The largest producer of groundnut is India
480. India’s largest mineral resource is coal
481. The gas evolved by leaves during photosynthesis is oxygen
482. After fertilization ovary is transformed into fruit
483. Green trees of the forests are generally called as food chain primary producers
484. Streptomycin was discovered by waksman
485. Kelp is brown algae
486. Habitat of penicillium is organic substance
487. Monocotyled are chaaracterised by fibrous root system
488. Typhoid is caused by bacteria
489. The ovules in gymnosplerms are exposed
490. Cell division useful for gamete formation is meiosis
491. Herbicide is used to kill the weeds
492. Tap root is positively geotropic
493. Seedless fruits are seen in all of these
494. Most advanced plants in the plant kingdom are angiosperms
495. Fibres are taken from plant as sclerenchyma cells
496. The process in which fruit is formed without fertilization is know as parthenocarpy
497. Calotropis is an example of the following phyllotaxy opposite and decussate
498. Phylloclade is a modified stem
499. Which of the following diseases is likely to spread in the entire community. If a leaky septic tank contaminates the water supply? Cholera
500. Where would the bacterium E.coli be readily found? human intestine
501. Quinine is made from cinchone bark
502. Phylllanthus nirui is a medicinal herb and it is used to cure jaundice
503. The dark reaction was worked out by an American scientist called Melvin Calvin
504. “Breathing roots” of mangrove plants are also called both (B) and (C)
505. Hydroponics is plant growth in liquid culture medium
506. Red tides are causd by red dinoflagellates
507. In angiosperms ovules develop into seeds
508. ‘Tikka’ disease is found in groundnut
509. The unicellular algae used in space craft to regulate oxygen supply is chlorella
510. Who is the well known Indian paleobotanist? Birbal sahni
511. Sharbati, Sonara, Kalyan Sona are the improved varieties of wheat
512. An algae yielding single cell protein of economic importance is spirulina
513. The process of transfer of desirable characters from on especies to other is known as selection
514. Wide variety of plants are observed in this tropical regions
515. Mycotoxins are pollutants because they affect most commonly water
516. Orchards are fruit garden
517. Foreign countries want to get plant materials of this plant from our country keeping in view the problem of chemical pesticides Azadirachta indica (neem)
518. Nitrogen fixation is generally brought about by Bacteria and blue green algae
519. “Pasteurization” means boiling and cooling to prevent microbial spoilage
521.Why is sprouted gram considered more nutritious? germinating seeds produce enzymes which are a rich source of protein
522. Which metal is present in green leaves? Magnesium
523. Pollinium found in the family Asclepiadaceae and Orchidaceae
524. Legume root nodule contains a protein pigment known as Leghaemoglobin
525. From the following,which one is edible fungi? Agaricus
526. Which type of cell gives mechanical support to the plant?Sclerenchyma
527. A sequence of nucleotides that specifies a particular polypeptide chain is called as gene
528. Cell wall is chemically made up of lignin, pectin and cellulose
529. Endocarp of fruit wall is innermost layer of fruit wall
530. Which group of organism is responsible for enriching soil fertility is an area? Micro-organisms
531. Amphibious plants with non-vascular nature group is called as bryophytes
532. Biggest herbarium located in south India is coimbatore
533. Smallest flowering plant is wolffia
534. Economic use of the genus araucaria gymnosperm plant is ornamental plant
535. First plant viruses were discovered in tobacco
536. The most characteristic feature of arthropoda is jointed appendages
537. The most successful vector in higher plants Ti-plasmid
538. one of the following is essential for seed germination water
539. The process by which RNA is formed from DNA is called transcription
540. Some plants develop fruits without fertilization, this phenomenon is called parthenocarpy
541.Which one of sthe following diseases is caused by viral infection? jaundice
542. Symbolic nitrogen fixation is done by Rhizobium
543. Lack of which element makes the plant insectivorous?Nitrogen
544. Founder of binomial nomenclature is Cark Linnaeus
545. Part of cinchona plant from which the drug quinine is obtained is bark
546. Turbantine is obtained from the plants of coniferales
547. Clover,the commonly used spice is obtained from the flower bud
548. Which one of the following p;ants produces allergenic pollen grains? congress grass
549. Opium is obtained from cannabis
550. Which one of the following is correctly matched? photosynthesis –Starch synthesis
551. Which one of the following is a major green house gas? CO2
552. The flow of genetic information from nucleic acid to protein is called transcription
553. Oxygen in the universe is replenished higher plant photosynthesis
554. Limnophylla haterophylla is an example of Amphibious plant
555. An example for a parasitic algae is cephaleuros
556. Atmospheric nitrogen can be fixed by Anabaena
557. In dycot roots, xylem is exarch
558. ‘The father of Genetics’’is G.J. Mendel
559. Which one of the following is not a hormone? lodine
560. Western Blot test is used in the diagnosis of AIDS
561. Pulses are rich in proteins
562. The pulp of the pear fruit is hard, because of the presence of sclereids
563. Pedology refers to the study of soil
564. The powerhouse of a cell is mitochondrion
565. The following medicine is obtained from the bark of cinchona Quinine
566. which one of the following is not a plant product? Rubber
567. Which of the following is inpotant element of chlorophyll? Magnesium
568. Grasses have fibrous roots
569. Primary producers are green plants
570. Match lists I correctly with list II and select you answer using the codes given below:
571. “callus’’ is referred as undifferentiated mass of tissues
572. Number of chromosomes in an organism is maintained by the following division. meiosis
573. Vascular cryptogams are pteridophytes
574. The raw materials used in the fermentation activity, in yeasts is (are) sugars and fruit juices
575. Artificial silk is prepared from synthetic fibres
576. The plant involved in sericulture is mulberry
577. Which one of the following is not correctly matched? Vessel –translocation of sugar
578. Which one of the following is called as “ maiden hair fern’’? Adiantum
579. A plant cel is distinguished from an animal cell by the presence of cell wall
580. The sporophyte develops from zygote
581.Geotropis can be demonstrated using clinostat
582. Who introduces binomial nomenclature? Linnaeus
583. Which one of the following is a complex tissue? Xylem
584. Which of the following cereals was among the first to be used by man? Barley
585. Transport of food materials in dicot plant is through Phloem
586. In India, the Research Institute in palaeobotany Lucknow
587. Distinction between plant and animal cells lies in respiration
588. The powerhouse of the cell is Mitochondria
589. Which part of the cauliflower is used as vegetable? Inflorescence
590. Which of the following is not found in plants? Vitamin B12
591. Insectilvorous plants capture insects for obtaining Nitrogen
592. The five kingdom concept was proposed by Whittaker

General Science

General Science

1) Planet nearest to the sun is Mercury & farthest to the sun is Neptune. (Note: Actually according the IAU, the Top most body in Astronomical Sciences, there are only 8 planets, hitherto farthest planet Pluto had been demoted to Dwarf planet in 2006. But school book mentions only 9 planets).
2) Gas law was given by Boyle.
3) Growth of the baby in the uterus is found using Ultra sound.
4) The forms of matter are 3 (Solids,Liquids & Gases), the fourth state of Matter is plasma.
5) The whether map telecast in T.V. is photographed by the satellite orbiting at a height of 36,000 km
6) The unit of work and energy is Joule.
7) Einstein got the Noble Prize for Photo – electric effect.
8) Asia’s biggest astronomical telescope is at Kavanur.
9) An example of semi – conductor is Germanium.
10) Unit of charge is coulomb.
11) Persistence of vision is the principle behind cinema.
12) The normal boiling point of a liquid is the temperature at which the vapour pressure of the liquid is equal to the atmospheric pressure.
13) The shining particles seen in the path of beam from a projector in cinema hall is due to scattering of light by dust particles in the path of the light.
14) “Decibel” is a unit of sound intensity.
15) The weight of a body is maximum at the poles,minimum at the equator & zero at the centre of earth.
16) Ball pen works on the principle of capillarity and surface tension.
17) A body will not radiate any heat energy at -273?C.
18) In a standing wave the distance between a node and adjacent antinode is ?/4.
19) A telescope and a microscope differ in that telescope has objective lens of large focal lengths and eyepiece of smaller focal lengths.
20) The centre of the Newton’s rings pattern is dark since the light undergoes a phase change ?.
21) Galvanometer can be converted into a voltmeter by using a high resistance in series.
22) Galvanometer can be converted into an ammeter by using a low resistance in paralell.
23) The apparatus used in submarines to give clear view of the objects on the surface of the ocean or ground is known as Periscope.
24) The metal is commonly used for making an electromagnet is Iron.
25) Kilowatt – hour is a commercial unit of power & watt is the general unit of power.
26) Choke is used to reduce the current in AC circuit.
27) The ozone layer protects us from ultra violet rays.
28) When a wave goes from one place to an other it transports energy.
29) A 100 watt bulb will consume one unit of electrical energy in 10 hours.
30) The solar system belongs to the galaxy called Milky way.
31) In an electric bulb, a little nitrogen or argon is introduced at low pressure to cool the hot filament.
32) An artificial satellite can be tracked very precisely from the earth by using Doppler effect.
33) The sudden fall of atmosphere pressure indicates storm.
34) The layer of the atmosphere which is responsible for the reflection of radio waves is Ionosphere.
35) Television was discovered by Baird J.L.
36) On adding a little antimony or phosphorous to germanium, we get n-type semiconductor.
37) The waves/rays produced by nuclear changes in the atom are X-rays.
38) Artificial satellites are used for TV transmission, Detecting minerals & for Space research.
39) Sound travels at maximum speed in steel & minimum speed at air (332 m/s).
40) The minimum lengths of a plane mirror in which a person can see himself in full length should be nearly half of his height.
41) If you walk towards a plane mirror at a speed of 10 cm/s, the speed does your image approach you is also 10 cm/s (with the same speed).
42) The normal temperature of human body on the Kelvin scale is 310 K or on the Celsius scale is 37º C or on the Fahrenheit scale is 98.6º F.
43) Electron microscopy is advantageous because much greater resolution is possible.
44) The phenomenon which cannot be explained by wave theory is photoelectric emission.
45) The size of the atom is 10-10m or 1 Å and that of atomic nucleus is 10-14 m.
46) The half life of a radioactive sample is 20 minutes. The fraction of the sample that will remain undecayed after 80 minute is 1/16.
47) Electrons can be accelerated to very high energies by means of cyclotrons.
48) Roentgen discovered x-ray.
49) Polariods are used in photo-elasticity.
50) Pure silicon is used in Electronic industry.
51) The lowest level energy band in a solid is called valence band.
52) Ice is slippery, when a man walks on it, for there is no friction.
53) When a vehicle passes, TV reception gets distorted due to spark plug creating electromagnetic disturbances.
54) The escape velocity of a projectile from the earth is approximately 11.2 km/s.
55) The rain-bearing clouds look black because the large number of water droplets in them absorb all the sunlight.
56) The sky is blue in colour because of the scattering of light by dust particles or air molecules.
57) Sound waves in air are longitudinal waves.
58) The density of pure water will be maximum at 4?C.
59) Penetrating power is greater in the case of ? – rays.
60) X – rays cannot penetrate through lead.
61) Copernicus discovered that the earth moves round the sun.
62) A raw egg and a boiled egg of the same appearance, same size and same mass can be distinguished, without breaking by using inertia of motion.
63) Nib of a pen is split keeping in view the phenomenon of capillarity.
64) Speeds of bodies exceeding the speed of sound are called ultrasonic.
65) Refractive index is highest for diamond (? = 1.65) & lowest for water (? = 1.33).
66) The splitting of a beam of white light into different colours is known as dispersion.
67) In winter, the temperature of the inside wall of a house as compared to the temperature of air in the room is lower.
68) At -40?C temperature, the readings of a centigrade and Fahrenheit thermometers are the same.
69) The relationship between Fahrenheit & Celsius temperature scales is F = 1.8 C + 32.
70) The relationship between Celsius & Fahrenheit temperature scales is C =
71) The relationship between Kelvin & Celsius scale is K = C + 273.
72) The electronic devices is used for digital displays in electronic calculators are LEDs.
73) The examples for non-magnetic substances are Glass, Wood & Silver.
74) According to Newton’s formula, the velocity of sound in a medium is V=E/D.
75) Light emerging from a Nicol prism has vibrations in only two mutually perpendicular directions ( those are the rays produced are ordinary rays & extra-ordinary rays)
76) The unit of refractive index is no unit
77) The examples for Insulators are Glass, Wood & Wool.
78) A radar which detects the presence of the enemy aircraft uses radio waves
79) The most basic of all test instruments is the Galvanometer.
80) The energy gap of diamond is 7 eV.
81) The positron is called the antiparticle of the electron, because it has opposite charge.
82) The radioactive decay follows N=Noe-?t.
83) ? – rays can be detected by passing them through scintillation counter.
84) Magnetron is used for the production of Microwaves.
85) The intensity of an earthquake is measured with a Seismograph.
86) Photo-cell converts light energy into electrical energy.
87) Alternating current is converted into direct current by rectifier.
88) The fuse wire is made of lead-tin alloy.
89) Sun spots are the magnetic storms on the surface of the sun.
90) The radiation with highest energy is X-ray.
91) A lift is falling freely after the suspension wire breaks. The weight of a person inside the lift would becomes zero.
92) The period of a simple pendulum will be doubled by making the pendulum length quadrupled (i.e,by making four times long).
93) The hairs of shaving brush cling together because of Surface tension.
94) Centripetal force needed to keep the moon in its orbit round the earth is provided by gravitational pull of sun.
95) Bats can fly in the dark without hitting anything because they are guided by ultrasonic waves produced by them.
96) As a person moves closer to a plane mirror the size of the image formed by the mirror remains the same.
97) Primary colours are red, blue and green.
98) A Pyrometer is used to measure high temperature.
99) Mercury thermometer is used for the measurement of very low temperature.
100) Control rods used in nuclear reactors are made of Graphite.
101) If the depth of floatation of a ship changes when it sails from the Arabian sea to the Indian ocean, it is due to change in density of sea-water.
102) A sudden decreases in the barometric pressure indicates a stormy weather.
103) The lens used to rectify long sight is convex lens.
104) The lens used to rectify short sight is concave lens.
105) A solar eclipse occurs when the moon comes between the sun and the earth.
106) A lunar eclipse occurs when the earth comes between the sun and the moon.
107) The process in which heat is transmitted without the aid of the intervening medium is radiation.
108) When the pressure increase, the boiling point rises is the principle of pressure cooker.
109) Nodes are positions of no displacement.
110) Antinodes are positions of maximum displacement.
111) Transformers are used to step up or step down AC voltage.
112) The instrument used to measure the radioactivity is Geiger counter.
113) The instrument used to test the purify of milk is Lactometer.
114) The velocity of a freely falling body Increases.
115) Momentum of a moving body depends upon both its mass & velocity.
116) The electromagnetic waves are of transverse in nature.
117) Land and sea breezes are due to convection of heat.
118) If sound persists even after its source has stopped producing sound is called reverberation.
119) Reed instrument without pipe is Harmonium.
120) The instrument which is used to measure the current flowing through a circuit is ammeter.
121) . The instrument which is used to measure the voltage or e.m.f. across any element of a circuit is voltmeter.
122) ?- particles are electrons.
123) X-rays exhibit the phenomenon of interference.
124) The phenomenon of radioactivity was discovered by Becquerel.
125) All things such as a feather, a wooden or a steel ball will fall down at the same speed in vacuum.
126) A micron is equivalent to 1/1000 mm or 10-6m.
127) The temperature at which centigrade and Fahrenheit scales give the same reading is -40? C.
128) Preferring white clothes in summer is because they are poor absorbers and good emitters of heat.
129) The scientist who discovered the relation between electricity and magnetic effects is Oersted.
130) For a transversely vibrating string, the frequency of vibration is directly proportional to its length.
131) The exclusion principle was proposed by Pauli.
132) The momentum of a body of mass ‘m’ moving with constant velocity ‘v’ is mv.
133) The period of oscillation of a simple pendulum decreases with length.
134) By the use of cold water, we can’t able to separate two tumblers stuck together into each other.
135) Water drops are spherical because of its surface tension.
136) Loudness of sound produced by a vibrating string is directly proportional to the amplitude.
137) The co -efficient of reflectivity of a perfect black body is zero.
138) Joule is the unit of energy
139) The colour of light is determined by its wave length
140) The wave theory of light was proposed by Huygen.
141) The corpuscular theory of light was proposed by Huygen.
142) The charge of an electron is -1.6X10-19 coulomb.
143) The common emitter configuration is more preferred than the common base configuration because the common emitter configuration gives high current gain, high voltage gain & high power gain.
144) Crystals having low melting points are in Mettalic bond.
145) In an AC circuit containing resistance only, the current is in phase with the voltage (e.m.f)
146) In an AC circuit containing inductance only, the current leads the voltage (e.m.f) by
147) In an AC circuit containing capacitance only, the current lags the voltage (e.m.f.) by
148) Substances which lose their electrical resistances at very low temperature are called Super-conductors.
149) Two men talk on moon they cannot hear each other at all (because there is no atmosphere).
150) In mountains, because the atmospheric pressure is low, the boiling point of water decreases.
151) By centrifugal action, we can separate particles of different densities.
152) Raman effect is due to scattering of light & total internal reflection.
153) A diamond shines brightly because it has high refractive index & low critical angle.
154) Water in a lake and nearby wells seeks the same level because of force of gravity.
155) The base of an electric iron is highly polished mainly to reduce heat loss by radiation.
156) Electronic devices that convert D.C. power in to A.C. power are called rectifiers.
157) The heating element in an electric stove is made of nichrome.
158) The least distance of distinct vision is 25 cm or 0.25 m.
159) The first satellite launched by India is Aryabhata (1975).
160) Aeroplane was invented by Orvile & Wilbur Wright (Wright Brothers).
161) The principle of a thermopile is Seebeck effect.
162) The wave theory of light was proposed by Huygens.
163) According to Kepler’s first law of planetary motion, planets move in elliptical orbits.
164) The value of gravitational constant G is 6.673×10 – 11 Nm2 Kg-2
165) The ratio of the linear stress to the linear strain of a body is called Young’s modulus.
166) For the same total weight and the same fuel supply, a multistage rocket is preferred to a single stage rocket because multi stage rocket is safer to launch.
167) 27? C can be expressed as 300 K.
168) When two resistors, each of value 10 ohms, are connected in parallel, the effective value of the combination is 5 ohms.
169) In optics, the relation between u,v and f is 1/f = 1/u + 1/v.
170) The half-life period of C14 is 5600 years. then the time required for C14 to become 1/4th of its initial size is 11,200 years.
171) Light year is the distance travelled by the light in one year
172) If an object weights 60 kg weight on earth, its weight on the surface of the moon will be 10 kg in weight.
173) A small drop of mercury is spherical due to Surface tension.
174) The unit of power of a lens is dioptre.
175) The smallest planet in the solar system is Pluto.
176) The time taken by light to travel from the sun to the earth is 8.33 sec.
177) A convex lens forms an image of a distant object on a screen. If the upper half of the lens is blocked by a piece of paper the lower half of the image will be cut off.
178) A transformer generates e.m.f.or Voltage.
179) In general, when the temperature of a metal is raised, its conductance remains the same.
180) Micro waves is used for satellite communication.
181) The colour of outer edge of rainbow will be violet.
182) The colour of inner edge of rainbow will be red.
183) When seen through a piece of red glass, the green leaves will appear black.
184) A substance is coloured due to the absorption of U.V. light.
185) Anemometer is used to measure the velocity of wind.
186) Tiruchirappalli station of All India Radio broadcasts at a frequency 1 mega hertz. This is equivalent to 10- 9 hertz
187) Waves produced on the surface of water is transverse waves.
188) Radioactivity may be natural and artificial.
189) Bending of light around an obstacle is due to diffraction.
190) A Speaker converts electrical energy into sound energy.
191) The spectrum of a source of light is called band spectrum.
192) X- rays carry unit negative charge
193) The waves received by our television sets are microwaves.
194) The relation amongst velocity (v), frequency (n) and wave length (?) is v=n/?.
195) The heavy water project is located at Kayaththar.
196) The heat of neutralisation is constant for strong acid-strong base.
197) The melting point of ice is 0?C.
198) Watt = Volt x Ampere.
199) The material which is used to make permanent magnets is steel.
200) When fast moving electrons are stopped suddenly by a metal target, X-rays are produced.
201) Liquid metal is Mercury.
202) The period of pendulum is 2.0 second.
203) The excess pressure applied at a point inside a liquid at rest is distributed equally in all directions. This principle is known as Pascal’s law.
204) Epidiascope is an instrument for projecting film on a screen.
205) The sky appears to be blue because of scattering of light.
206) The quantity of heat required to raise 2 kg. of copper from 303 K to 353 K? (Specific heat capacity of copper = 355 J/kg/K) 38500 Joules.
207) In a tape recorder, the sound is recorded on the tape by a variable magnetic field.
208) Pipe instrument without reeds is Violin.
209) Beta (?) particle is negatively charged particle called electrons.
210) Rate of change of momentum is Force.
211) Unit of Force in the M.K.S. system is Newton.
212) One unit of electrical energy consumption equal to 1000 watt per hour.
213) At sunrise and at sunset sky appears red because red light scatters less.
214) 68? Fahrenheit is equal to 20?C.
215) The force of attraction between planets is correctly given by Newton.
216) A boat moves forward when water is pushed back. The basic physical law applicable here is Newton’s third law of motion.
217) The mass of 5 litres of mercury is 5 kg.
218) Sound cannot pass through vacuum.
219) In a dynamo, mechanical energy is converted into electrical energy.
220) Induced e.m.f. is directly proportional to rate of change of flux.
221) In a step-up transformer, the number of turns in the secondary is more than in the primary.
222) In a step-down transformer, the number of turns in the secondary is less than in the primary.
223) D.C. voltage cannot be used in a transformer.
224) The condition for total internal reflection of light is a ray must pass from denser to rarer medium.
225) Sea water turns into ice at 4?C.
226) A person climbing a hill bends forward in order to increase stability.
227) Mirage observed on a road on hot days is due to total internal reflection.
228) Perspiration is maximum when temperature is high and air is dry.
229) One horse power is equal to 746 watts.
230) Mercury boils at 357?C.
231) The purity of milk is measured with lactometer.
232) Instrument used in a submarine to see over the top when it is submerged is Periscope.
233) Printing for the blind was introduced by Louis Bairille.
234) The filament of an electric bulb is made of tungsten.
235) Crystal dynamics was invented by C.V. Raman.
236) Foods stuffs remain fresh in refrigerator by preventing fermentation due to very low temperature.
237) The glass used in the preparation of lenses and prisms is Pyrex glass.
238) When the mass and velocity are doubled, kinetic energy will increase 8 times.
239) Colour formation in thin films is due to interference.
240) Photometers are instruments used to measure intensity comparison between different lights & sounds.
241) Rays from the head light of a car is rendered parallel by concave lens in front of the light.
242) The diameter of the aperture of a camera is doubled. To compensate this, the aperture time in shutter should be made ½.
243) Excited atoms gives rise to Raman Spectrum.
244) The wheel of a forward moving vehicle has 8 supporting spokes. It is photographed on a motion picture film which runs at a speed of 24 films per second. The wheel appears to be in the film, if the speed of rotation/sec. of the wheel is 3.
245) Laser is a device to produce coherent waves.
246) Transfer of heat by molecular collision is conduction.
247) The specific volume of water is minimum at 4? C
248) In an isothermal process, temperature remains constant.
249) Electron – volt is a unit to measure energy.
250) The instrument used to determine the thickness of a piece of paper is Screw gauge.
251) The condition favourable for the formation of dew is Hot day followed by a cold night.
252) Doppler effect in sound produces apparent change in frequency.
253) Boyle’s law states the relationship between pressure and volume.
254) Crystallisation is the process used to purify a soluble solid.
255) The properities of a liquid does not affect its rate of evaporation is Volume.
256) The process involves two changes of state is Distillation.
257) The function of the thermostat in a refrigerator is to regulate the temperature.
258) Small bodies from interplanetary space when enter into our atmosphere become luminous. These are called meteors.
259) The newly discovered high temperature super conductors are inorganic polymers.
260) The sound of a guitar and a violin can be differentiated because of the difference in the frequency of pitch.
261) There is a spluttering sound when water is sprinkled on hot oil because Oil and water do not mix.
262) The phenomenon of mirage is due to change in the refractive index of air with change in temperature.
263) In India, Apsara is connected with nuclear reactor.
264) The instrument used for measuring the force and velocity of wind is anemometer.
265) Tungsten is used in the manufacture of electric bulbs because it has high melting point.
266) Evaporation does not take place at all temperature.
267) Silicon is a semiconductor.
268) Electric current is the flow of free electrons.
269) The mass of an electron is 9.11×10 -31 kg or 9.11 x 10-28 g.
270) Food is cooked quickly in a pressure cooker because boiling point of water increases.
271) The unit of Surface tension is N/m.
272) Dry ice is water.
273) Solids can be identified by using line spectrum.
274) Banking of curves on roads is done to provide centripetal force.
275) A force acting on a body of 12 kg mass produces an acceleration of 1m/s2 is 12 Newton.
276) A medium can carry longitudinal wave because of elasticity.
277) When a wave goes from one place to another, it transports energy.
278) A hot body will radiate heat most rapidly if its surface is black and rough.
279) The base of the electric iron is brightly polished mainly to reduce heat lost by radiation.
280) X-rays cannot pass through bone.
281) The scientist who discovered that current can be produced in a closed conductor is Michael Faraday.
282) The densities of three liquids are D, 2D and 3D, then the density of the resulting mixture if equal volume of the three liquids are mixed is 2D.
283) When a ship floats on water, the weight of water displaced is more than that of the ship.
284) GLSV project of India is connected to missile engines for space programmes.
285) A decibel is the relative intensity of sound.
286) An antenna converts radio waves into electrical signals and vice versa.
287) The ozone layer protects us from UV radiations.
288) Through a soap film, different colours are seen by white light because of the phenomenon of interference.
289) Sound energy is converted into an electrical energy by a microphone.
290) Light from the Laser is monochromatic.
291) The unit of impedance is Ohm.
292) In an electronic watch, the component corresponding to pendulum of a pendulum clock is crystal oscillator.
293) Density of mercury is 13.6 times the density of water.
294) If the power of a lens is 5 dioptre, then the focal length of the lens is 20 cm.
295) Hershal invented ultra violet rays.
296) The surface water in a lake is just going to freeze, then the temperature at the bottom is 4? C.
297) Velocity of sound in air at a given temperature is independent of pressure.
298) Decibel is the unit of sound intensity.
299) The heater element in an electric iron box is made of Nichrome.
300) The device employed to convert electrical energy into mechanical energy is motor.
301) When a ship enters a sea from a river, it rises a little because of change in densities of water.
302) The unit of moment of force is Newton-metre(Nm).
303) The single force which effectively replaces two or more forces acting on a body is known as Resultant Force.
304) By Radiation process, the heat is transmitted from the filament of an evacuated electric bulb to the glass.
305) Specific heat capacity of water at 293 K is 4190 JKg -1 K-1.
306) The velocity of light in water is ¾ to that in air, then.the refractive index of water is 4/3 or 1.33.
307) A compound microscope is constructed using an objective of magnification Mo and an eyepiece of magnification Me. The magnification of the microscope is Mo Me.
308) Sonometer can be used to determine the frequency of a tuning fork.
309) In a tape recorder, during the reproduction of sound at the playback head varying magnetic field produces a varying electric current.
310) The direction of motion of a current carrying conductor in a magnetic field is given by Fleming’s right – hand rule.
311) Alpha rays are positively charged particles.
312) Electron was discovered by J.J. Thomson.
313) Atom bomb is based on the principle of nuclear fission.
314) Hydrogen bomb is based on the principle of nuclear fusion.
315) Proton carries a positive charge.
316) The name of the nuclear reactor at Trombay is Apsara.
317) Boyle’s law states that “Volume of a gas is inversely proportional to pressure”.
318) A spring balance is pulled by 2 persons equally with 20 newton force on its two ends. Thus it will show a reading of 20 newtons.
319) Day and night are the results of earth’s rotation around itself.
320) A body executes simple harmonic motion. Its velocity at the mid-point is zero.
321) Boiling point is an extensive property.
322) A small quantity of water placed in an open pan is allowed to evaporate. The temperature of the pan will decrease.
323) Lunar eclipse occurs on a full-moon day.
324) When a rubber ball is dropped in a hard surface, it rebounds because of elastic forces & it cannot penetrate.
325) The reason for the appearance of different colours on a soap bubble is Interference due to multiple reflection.
326) Polarization is the phenomenon which differentiates light and sound waves.
327) Polarization is the phenomenon which differentiates transverse and longitudinal waves.
328) The device used to measure voltage, current and resistance is called a multimeter.
329) The radio isotope used for locating brain tumour is Iodine.
330) Electric bulbs are filled with the gas argon.
331) X – rays travel with the velocity of light.
332) A loudspeaker converts electrical energy into sound energy
333) The transverse wave nature of light was proved by polarization.
334) Electric iron takes a long time to cool because of lesser emissivity.
335) Density of the matter is defined as mass/volume.
336) The resultant upthrust on a body partly immersed in liquid acts through the centre of gravity.
337) A transverse wave travel along z- axis. The particles of the medium must move along in x- y plane.
338) The principle of action of points is used in lighting arresters.
339) A jet engine works under the principle of linear momentum.
340) The Stefan’s fourth power law of radiation is used to find the temperature of the sun.
341) The blood circulation in muscles is due to capillary action.
342) Radio carbon dating is used to find the age of old specimen.
343) Frequency modulation is more advantageous than amplitude modulation because there will be no distortion
344) Sound is not audible in moon because it does not have atmosphere.
345) Transmission of heat from the sun to the earth is by radiation.
346) The reactor in Kalpakkam is Breeder reactor.
347) An electric fan working at constant speed consumes electric energy because of induction.
348) A person can jump higher at the moon’s surface than on the earth’s surface, since the moon has no atmosphere.
349) Rising or setting sun appears red due to the fact that scattering of light rays takes place at sunrise and sunset
350) The nature of fuse wire is high resistance and low melting point.
351) Heat waves are otherwise known as solar radiation.
352) The time taken by the light from the nearest star – centauri to reach the earth is 4.3 years.
353) When an object is transferred from the moon to the earth, Its weight increases and its mass remains constant on the earth.
354) On adding salt to water, the boiling point and freezing point of water will decrease and increase respectively
355) Vehicle tyres are inflated properly to go fast and save fuel.
356) When a body is negatively charged by friction, it gains electrons.
357) The unit of electrical conductivity is mho.
358) If the diameter of a blood vessel is halved, then the speed of blood flow will increase by 2.
359) The value of 0? absolute in Fahrenheit scale -40?.
360) Force=mass?acceleration is got from Newton’s second law.
361) A sensitive balance has an object on left pan and equal weights on its right pan. Now air is blown fast below the left pan. Then the left pan will oscillate at first.
362) Neighbouring two planets to our earth are Venus and Mars.
363) Our earth while it revolves round the sun, moves in one hour, a distance of 1 lakh km.
364) The full shape of a rainbow is Parabola.
365) The oil in the wick of an oil lamp rises up due to capillary action.
366) The lightest particle is Electron.
367) The substance has the highest specific heat is Water.
368) The surface tension of a liquid with increase of temperature decreases.
369) When a common salt is mixed with ice, the freezing point is lowered.
370) Current always flows from high potential to low potential.
371) The surface temperature of sun is 6,000 K.
372) The unit of moment of force is Newton-metre
373) Orbital velocity of a satellite close to the earth is 8km/sec.
374) The period of revolution of a satellite close to the earth is 5000 sec.
375) The unit of co-efficient of viscosity is Nsm-2.
376) Osmotic pressure of dilute solutions can be compared to laws of diffusion.
377) Radiometer is used to detect infra-red radiations.
378) TV-waves are otherwise known as Micro waves.
379) Voltmeter is voltage measuring instrument.
380) In nuclear reactors, graphite rods are used to reduce the speed of neutrons.
381) The engine power of the glide plane is 0 H.P.
382) Laws of planetary motion was given by Kepler.
383) 27?C can be expressed as 300 K.
384) Graphite is used as the moderator in Nuclear reactor.
385) Ultrasonic waves have frequency above audible range (i.e,> 20,000 Hz)
386) A simple microscope has convex lens.
387) Tesla is the unit of Magnetic induction.
388) The electro magnetic radiation travel with a velocity of 3×108 m.
389) Absolute zero, if the temperature of -273?C.
390) The discovery of electricity is attributed to Michael Faraday.
391) The flying of birds is a consequence of Newton’s Third law.
392) The value of gravitational constant is 6.673?10-11Nm2kg-2.
393) The element that has same atomic number and atomic weight is Hydrogen.
394) The Photon is non-divisible..
395) A radar which detects the presence of enemy aircraft uses radio waves.
396) The spectrum of Black body radiation is continuous.
397) When the two balls collide elastically, then both kinetic energy and momentum are conserved.
398) The planet between Earth and Mercury is Venus.
399) Noise pollution results when the sound increases beyond 120 decibels.
400) The velocity of sound in a gas is independent of humidity.
401) An astronaut in an earth satellite will observe the sky is black.
402) The colour of star is an indication of it’s temperature.
403) A rocket can go vertically upwards in the earth’s atmosphere because of the forces exerted on the rocket by gases ejected by it.
404) Raman Effect deals with quantum theory
405) In the motion of simple pendulum, the tension in the string is the greatest when the bob is at the centre.
406) Gas thermometers are those which work on thermal expansion of glass.
407) The property of the ideal gas is “There is no force of attraction, between any two molecules”
408) Microwaves are used in radar because of reflection and high frequency.
409) To an astronaut in a spaceship, the sky appears pitch dark due to the absence of atmosphere in his neighbourhood.
410) Light appears to travel in straight line. This is due to its short wavelength.
411) Madam curie became famous for her discovery of Radium.
412) Two tuning forks have same natural frequency. One of them is loaded with wax. When they are sounded together, they will produce beats.
413) Cathode ray oscilloscope is used to study wave forms.
414) The energy generation in sun and stars is mainly due to fusion of light nuclei.
415) Mercury is used in thermometer because it expands uniformly
416) Indian scientist who received the Nobel prize was Sir.C.V.Raman
417) Traffic signals are painted with paints of light reflecting.
418) According to Stefan’s law, the total energy emitted by a black body is proportional to T4.
419) All bodies large or small, fall with the same acceleration.
420) Electric charges following along a conductor are electrons.
421) In a visible spectrum, as we move from violet to red the wavelength increases.
422) Light is propagated in the form of transverse waves.
423) Water is in a beaker. Ice floats in it. If it melts, the water level will remain the same.
424) A bucket of water is suspended from a spring balance. A stone is tied to a thread and immersed into water from outside. Then the reading will increase.
425) Our atmosphere is spread up to the height of 300 km.
426) A red light is used in a traffic signal, because it has the longest wavelength.
427) Our eye is most sensitive to red colour.
428) A cloth appears green in yellow, blue in blue and dark in red light. Its true colour will be yellow.
429) A transformer transformers voltage.
430) Zener diode is used as a regulator of voltage.
431) In potentiometer experiment, when the galvanometer shows no deflection, then no current flows on potentiometer wire.
432) Isotopes of uranium are used in nuclear fission.
433) If the humidity of air increases, the velocity of sound increases.
434) The combination of properties would be most desirable for a cooking vessel are Low specific heat and high conductivity.
435) The door of an open Rating refrigerator in a room is kept open, the room will become warmer.
436) If the distance between two charges placed in air is increased two times, the force between them decreases by four times.
437) Particles which can be added to the nucleus of the atom without changing its chemical properties are Neutrons.
438) The unit of current is Ampere.
439) Light year is a unit of distance.
440) No two electrons will have all the four quantum numbers equal. This statement is known as Pauli’s exclusion principle.
441) The emission of a particle in radio activity increases the mass number by one.
442) When a metal ring is heated, its inner diameter will increase.
443) When ice melts, its volume will decrease.
444) An electric fan is switched on inside a class room. Then the air inside the room will heat up.
445) A cork floating in water in a beaker when full, comes to centre due to adhesive forces of water.
446) Rocket works on the principle of law of conservation of momentum.
447) Moment of momentum is called angular momentum.
448) Light travels 1 million times faster than sound.
449) When a glass plate is introduced between the plates of a condenser, its capacity increases.
450) Electric heater works on the principle of Joule’s law.
451) Solar cells are made up of Both Si and Ge
452) Substitute of U-235 as nuclear fuel is Plutonium-239.
453) The velocity of light in vacuum is 3?108 ms-1.
454) When milk is churned, cream gets separated due to centrifugal force.
455) Two glass plates having a little water in between cannot be easily separated because of surface tension.
456) Sound waves having which frequency are audible to human beings is between 20 Hz to 20,000 Hz.
457) We cannot see during a fog because of internal reflection.
458) Steam at 100?C is causing more injury than water at 100?C the reason is that the latent heat of condensation of steam gives additional heat energy.
459) Transformer is used to an electric lamp of low voltage on A.C. mains of higher voltage.
460) Photoelectric effect help us in converting electrical energy into sound energy.
461) Radioactivity is exhibited by all elements under proper conditions.
462) When a body is taken from the earth to the moon, its mass remains unchanged.
463) In 1.2 years, half of 64 mg. of radioactive isotope decays the amount present after 6 years is 2 mg.
464) The weight of an object would be zero when it is placed at the Centre of the earth.
465) The apparent change in frequency due to a relative motion between the source and the observer is known as Doppler’s principle.
466) Instrument used to see objects when they are hidden from direct view is known as periscope.
467) In traffic signals, red light is used to caution against danger ahead. This is because eye has maximum sensitivity for red.
468) The flame of a candle is always upwards irrespective of its position. This is because of the reaction of gravitational force.
469) A transformer works on A.C only.
470) A remote control gadget (for T.V. etc) has in it a small transmitter that emits infrared signals.
471) In a nuclear reactor, the function of an arrestor is to absorb the neutrons.
472) An electron microscope is superior to an optical microscope because it has better resolving power.
473) A particular star has mass twice that of sun. This star will end up eventually as a black hole.
474) Planets do not twinkle because they are nearer to us and so their light does not pass through the atmoshohere
475) The ozone layer in atmosphere helps in the acceleration of photo synthesis.
476) If a body is to escape from the earth’s gravitational force, it must be given a minimum velocity of 11.2 kilometre/sec
477) An aneroid barometer used no liquid at all.
478) The colour has the longest wavelength is Red.
479) Sound does not travel in vacuum.
480) A 100 watt, 220 volt lamp takes a current of 5/11 amps.
481) The material used for magnetic shielding is Soft iron.
482) The Unit of force is Newton.
483) A car is moving on a road when rain is falling vertically downwards, Rain will strike the front screen only.
484) Archimedes principle states that “A body when immersed in a liquid, experiences an upward thrust equal to the weight of the liquid displayed by it”.
485) Hydraulic brakes in automobiles work on Pascal’s principle.
486) A lens with power +1 dioptre must have its focal length equal to100 cm.
487) The velocity of light in air is 3?1010 cm/sec. Its velocity in glass whose =1.5 will be 2?1010 cm/sec.
488) During change of state, the temperature remains constant.
489) The device that is used to determine the depth of the sea is SONAR.
490) In a dry cell, the positive electrode is carbon.
491) The colour which deviates maximum during the dispersion is violet.
492) In the freezing mixture, the ratio of ice and salt to lower the temperature to -13?C is 3:1.
493) Alpha rays is not electromagnetic in nature.
494) The amount of work done in drawing a bucket of water weighing 5 kg from a well of depth of 10 metre . (g=9.8ms-2) is 490 joule.
495) Recording of sound on tapes was first invented by Poulsen.
496) The scientist who first successfully converted magnetic energy into electric energy is Faraday.
497) The rays which are not deflected by electric fields are Gamma rays.
498) Radio cobalt is used to treat the cancer.
499) J.J. Thomson discovered electrons.
500) Grass looks green because it absorbs all colours in the spectrum except green.
501) A girl is swinging on a swing in a sitting position. If she stands up and wings then the period of oscillation will increase.
502) Milk inside a thermos flask is stirred vigorously by shaking its temperature does not change.
503) A woman’s voice is shriller than a man’s voice due to higher frequency.
504) The process of nuclear fission occurs mainly in nuclear reactors.
505) The process responsible for the enormous energy in the sun is nuclear fusion.
506) Air is neither an element nor a compound.