Chemistry Practice Sets for WBCS, SSC, Rail, UPSC Exam P8

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Page 8

168371. Muriatic acid used in household work is a diluted form of

A

Oxalic acid

B

Aqua regia

C

Acetic acid

D

Hydrochloric acid

D

Correct Answer: D. Hydrochloric acid

168472. In underground Railways, the air is purified by using

A

Oxygen

B

Hydrogen peroxide

C

Ozone

D

None of the above

B

Correct Answer: B. Hydrogen peroxide

168573. Ozone depletion in the stratosphere is mainly caused by

A

Chlorofluorocarbon

B

Nitric Oxide

C

Sulphur-di-Oxide

D

Carbon dioxide

A

Correct Answer: A. Chlorofluorocarbon

168674. Which one of the following is not a metal?

A

Nickel

B

Silicon

C

Platinum

D

Mercury

B

Correct Answer: B. Silicon

168775. The volume of a vessel containing an ideal gas is doubled and its temperature (in °K) is also doubled. The pressure of the gas

A

In one-fourth of the original pressure

B

Is four times the original pressure

C

Remains unchanged

D

Is doubled

C

Correct Answer: C. Remains unchanged

168876. Which of the following substances can act as an only reducing agent?

A

K₂Cr₂O₇

B

H₂S

C

H₂O₂

D

MnO₂

B

Correct Answer: B. H₂S

168977. Hydrogen peroxide has the same number of electrons as (Iso-electronic Species)

A

CH₂ = CH₂

B

CH₃CHO

C

HCHO

D

CH₃OH

D

Correct Answer: D. CH₃OH

169078. Vulcanization is the process of heating rubber with 3-5 % of

A

Potassium permanganate

B

Naphthalene

C

Sulphur

D

Lime

C

Correct Answer: C. Sulphur

169179. Paint and Varnish contains

A

Mustard oil

B

Kerosene oil

C

Linseed oil

D

Coconut oil

C

Correct Answer: C. Linseed oil

169280. Which pollutant of the atmosphere inhibits the Hill reaction of photosynthesis?

A

Ultraviolet rays

B

Hydro Carbon

C

Peroxyacetyl nitrate

D

Nitrogen monoxide

C

Correct Answer: C. Peroxyacetyl nitrate

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