Chemistry

H T T P S : / / W W W . F A C E B O O K . C O M / E X A M . A F F A I R S . E A

2014

Chemistry SHORT QUESTIONS AND ANSWERS

Exam Affairs!

Chemistry

FULL PART 1 - 20

~*~~*~~*~~*~~*~~*~

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 (Nh4)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

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 anthracite

99. A solution of 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 carbon monoxide

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

353. The two isotopes of chlorine are 17CI37and17CI37

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. Answer is 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 hair-dye 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 thio sulphate

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

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

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

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

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 silk.

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 bicarbonate.

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

~*~ Exam Affairs ! ~*~

For Regular Updates Like Us on facebook - https://www.facebook.com/Exam.Affairs.EA