Exam Preparation of General Science (Chemistry) with PDF Notes P30

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Page 30

90074291. Oxygen which is vital for life is a product of photosynthesis and comes from

A

carbonates from soil

B

carbon dioxide

C

water

D

oxides of mineral elements

C

Correct Answer: C. water

90115292. The gas used for artificial fruit ripening of green fruit is —

A

Ethylene

B

Acetylene

C

Ethane

D

Methane

A

Correct Answer: A. Ethylene

90029293. Cokking gas is a mixture of

A

methane and ethylene

B

carbon dioxide and oxygen

C

butane and propane

D

carbon monoxide and carbon dioxide

C

Correct Answer: C. butane and propane

90047294. German silver is an alloy of

A

copper, nickel and silver

B

silver, copper and aluminium

C

zinc, copper and nickel

D

zinc, silver and copper

C

Correct Answer: C. zinc, copper and nickel

90043295. Fermentation of milk to curd is due to

A

Mycobacterium

B

StaphylocoCcus

C

Lactobacillus

D

Yeasts

C

Correct Answer: C. Lactobacillus

90176296. Which of the following imparts a deep blue color to glass?

A

Cobalt oxide

B

Cupric oxide

C

Ferrous oxide

D

Nickel oxide

D

Correct Answer: D. Nickel oxide

90170297. Which metal is extracted from sea water?

A

Potassium

B

Magnesium

C

Aluminium

D

Beryllium

B

Correct Answer: B. Magnesium

90054298. Helium gas is used in gas balloons instead of hydrogen gas because it is

A

lighter than hydrogen

B

more abundant than hydrogen

C

non-combustible

D

more stable

C

Correct Answer: C. non-combustible

90173299. Which of the following elements is non-radioactive?

A

Uranium

B

Thorium

C

Plutonium

D

Zirconium

D

Correct Answer: D. Zirconium

90145300. The tip of the match-stick contains

A

phosphorus pentoxide

B

white phosphorus

C

red phosphorus

D

phosphorus trichloride

C

Correct Answer: C. red phosphorus

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General Science MCQ PDF Download For Competitive Exam P29

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Page 29

90184281. Which of the following is used to iodize common salt?

A

Potassium iodide

B

Iodine

C

Potassium iodate

D

Sodium iodide

C

Correct Answer: C. Potassium iodate

90085282. Seaweeds are an important source of

A

iron

B

chlorine

C

bromine

D

iodine

D

Correct Answer: D. iodine

90005283. Aluminium can be purified by

A

oxidation

B

distillation

C

electrolysis

D

ozonolysis

C

Correct Answer: C. electrolysis

90167284. Which gas is used as a fire extinguisher ?

A

Carbon dioxide

B

Carbon monoxide

C

Carbon suboxide

D

Sulphur dioxide

A

Correct Answer: A. Carbon dioxide

90126285. The metallic constituents of hard water are

A

Magnesium, calcium and tin

B

Iron, tin and calcium

C

Calcium, magnesium and iron

D

Magnesium, tin and iron

C

Correct Answer: C. Calcium, magnesium and iron

90136286. The polymerisation of which of the following is used in the manufacturing of polythene in the industry?

A

Methane

B

Styrene

C

Acetylene

D

Ethylene

D

Correct Answer: D. Ethylene

90150287. Vinegar made by fermentation from cane sugar contains

A

palmitic acid

B

lactic acid

C

citric acid

D

acetic acid

D

Correct Answer: D. acetic acid

90075288. Ozone consists of

A

Oxygen only

B

Oxygen and Nitrogen

C

Hydrogen and Carbon

D

Oxygen and Carbon

A

Correct Answer: A. Oxygen only

90010289. An atomic pile is used for

A

producing X-rays

B

conducting nuclear fission

C

conducting thermonuclear fusion

D

accelerating atoms

B

Correct Answer: B. conducting nuclear fission

90183290. Which of the following is used to denature ethanol?

A

Methyl alcohol

B

Propyl alcohol

C

Phenol

D

Methane

A

Correct Answer: A. Methyl alcohol

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General Science (Chemistry) Practice Sets For Competitive Exam P28

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Page 28

90018271. Bhopal gas tragedy is associated with leakage of

A

carbon dioxide

B

nitrogen dioxide

C

sulphur dioxide

D

methyl isocyanate

D

Correct Answer: D. methyl isocyanate

90062272. Litmus is obtained from

A

a bacterium

B

a fungus

C

an alga

D

lichen

D

Correct Answer: D. lichen

90039273. Dry powder fire extinguishers contain

A

sand

B

sand and sodium carbonate

C

sand and potassium carbonate

D

sand and sodium bicarbonate

D

Correct Answer: D. sand and sodium bicarbonate

90053274. Helium gas is filled in ballons because

A

its atomic number is 2

B

it is lighter than air

C

it is one of the constituents of water

D

it is a noble gas

B

Correct Answer: B. it is lighter than air

90021275. Brass is an alloy of

A

Lead and tin

B

Zinc and copper

C

Antimony, tin and lead

D

Zinc, tin and copper

B

Correct Answer: B. Zinc and copper

90050276. Gold dissolves in

A

Hydrochloric acid

B

Nitric acid

C

Aqua-regia

D

Acetic acid

C

Correct Answer: C. Aqua-regia

90160277. What is the most commonly used substance in fluorescent tubes?

A

Sodium oxide and argon

B

Sodium vapor and neon

C

Mercury vapor and argon

D

Mercury oxide and neon

C

Correct Answer: C. Mercury vapor and argon

90070278. Non-stick kitchenwares are coated with

A

PVC

B

Graphite

C

Teflon

D

Silicon

C

Correct Answer: C. Teflon

90129279. The most abundant inert gas in the atmosphere is

A

Helium

B

Neon

C

Argon

D

Krypton

C

Correct Answer: C. Argon

90194280. Which one of the following is radioactive?

A

Cesium

B

Platinum

C

Strontium

D

Thorium

D

Correct Answer: D. Thorium

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Important MCQ on General Science Chemistry P27

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Page 27

90151261. Vulcanization of rubber is carried out by adding

A

Sulphur

B

Carbon

C

Ozone

D

Phosphorus

A

Correct Answer: A. Sulphur

90154262. What are the major pollutants of cigarette smoke?

A

Carbon monoxide and dioxin

B

Carbon monoxide and nicotine

C

Carbon monoxide and benzene

D

Dioxin and benzene

B

Correct Answer: B. Carbon monoxide and nicotine

90119263. The iron ore which contains 72% of iron is

A

Magnetite

B

Limonite

C

Haematite

D

Siderite

A

Correct Answer: A. Magnetite

90118264. The hardest allotrope of carbon is

A

diamond

B

graphite

C

coke

D

lamp black

A

Correct Answer: A. diamond

90120265. The isotope of Uranium used in atomic reactors is

A

U-235

B

U-236

C

U-237

D

U-232

A

Correct Answer: A. U-235

90032266. Denatured spirit is ethanol mixed with

A

Petrol

B

Kerosene

C

Water

D

Pyridine

D

Correct Answer: D. Pyridine

90034267. Detergents clean surfaces on the principle of

A

viscosity

B

surface tension

C

elasticity

D

floatation

B

Correct Answer: B. surface tension

90205268. Which variety of coal contains recognisable traces of the original plant material?

A

Anthracite

B

Lignite

C

Peat

D

Bitumen

C

Correct Answer: C. Peat

90081269. Quartz is a crystalline form of

A

Alumina

B

Glass

C

Silica

D

Limestone

C

Correct Answer: C. Silica

90157270. What is the chemical name of 'Baking Soda'?

A

Sodium carbonate

B

Sodium bicarbonate

C

Sodium nitrite

D

Sodium nitrate

B

Correct Answer: B. Sodium bicarbonate

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GS Practice Sets For Competitive Exam Preparation P26

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Page 26

90114251. The Fungus which is used in the alcohol industry Is

A

Mushroom

B

Candida Aibicans

C

Yeast

D

Rhizopus

C

Correct Answer: C. Yeast

90178252. Which of the following is a supercooled liquid?

A

Ice Cream

B

Teflon

C

Glass

D

Mercury

C

Correct Answer: C. Glass

90045253. Galena is a mineral of

A

iron

B

gold

C

lead

D

calcium

C

Correct Answer: C. lead

90038254. Drinking soda is

A

Alkaline

B

Acidic

C

Neutral

D

Oxidant

B

Correct Answer: B. Acidic

90134255. The nucleus of an atom consists of.

A

Proton

B

Neutron

C

Proton and Neutron

D

Electron, Proton and Neutron

C

Correct Answer: C. Proton and Neutron

90112256. The ft fundamental particles present in the nucleus of an atom are

A

Electron, proton

B

Proton, neutron

C

Neutron, electron

D

Neutron, positron

B

Correct Answer: B. Proton, neutron

90127257. The metals commonly used for electroplating are

A

Gold, Sodium and Chromium

B

Chromium, Copper and Nickel

C

Nickel, Lead and Chromium

D

Gold, Sodium and Potassium

B

Correct Answer: B. Chromium, Copper and Nickel

90177258. Which of the following is a mono-atomic gas?

A

Oxygen

B

Neon

C

Nitrogen

D

Fluorine

B

Correct Answer: B. Neon

90122259. The main source of Naphthalene is

A

Charcoal

B

Camphor

C

Coal-tar

D

Diesel

C

Correct Answer: C. Coal-tar

90017260. Aspirin is the common name of

A

Salicylic Acid

B

Salicylate

C

Methyl Salicylate

D

Acetyl Salicylic Acid

D

Correct Answer: D. Acetyl Salicylic Acid

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General Science (Chemistry) For Competitive Exam Preparation P25

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Page 25

90191241. Which one of the following gases has the highest calorific value?

A

Natural gas

B

Water gas

C

Coal gas

D

Indane gas

D

Correct Answer: D. Indane gas

90168242. Which is abundant in Gobar gas?

A

Carbon dioxide

B

Methane

C

Oxygen

D

Hydrogen

B

Correct Answer: B. Methane

90104243. The chemical used in embalming biological materials is

A

formaldehyde in water

B

formaldehyde in methanol

C

ethylene glycol

D

gaseous formaldehyde

A

Correct Answer: A. formaldehyde in water

90149244. Urea is a

A

Sodium fertilizer

B

Phosphatic fertilizer

C

Nitrogenous fertilizer

D

Potassium fertilizer

C

Correct Answer: C. Nitrogenous fertilizer

90117245. The gas which turns into liquid at the lowest temperature among the following is

A

hydrogen

B

oxygen

C

helium

D

nitrogen

A

Correct Answer: A. hydrogen

90048246. Glass is a

A

pure solid

B

supercooled liquid

C

gel

D

polymer

B

Correct Answer: B. supercooled liquid

90188247. Which of the toxic heavy metals is found in modern tannery industries?

A

Nickel

B

Zinc

C

Chromium

D

Lead

C

Correct Answer: C. Chromium

90046248. Galvanization of iron is carried out using

A

Zinc

B

Tin

C

Copper

D

Chromium

A

Correct Answer: A. Zinc

90098249. The acid used in lead storage cells is

A

phosphoric acid

B

hydrochloric acid

C

nitric acid

D

sulphuric acid

D

Correct Answer: D. sulphuric acid

90161250. What is the name of that system. which uses radioactivity to decide the period of materials of-pre-his-toric period ?

A

Radium dating

B

Uranium dating

C

Carbon dating

D

Deuterium dating

C

Correct Answer: C. Carbon dating

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