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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