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PPSC Chemistry Part V Environmental Chemistry Online Test MCQs With Answers

Question # 1

Permanent hard water is softened by addition of.

Choose an answer

Na2CO3

CaCO3

MgCO3

ZnCO3

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Question # 2

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

automobiles

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Question # 3

Which of the following gas protects us form harmful effect of uv radiation.

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SO2

NO2

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Question # 4

Which of the following substance is a volatile metals.

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Lead

Zinc

Mercury

Sodium

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Question # 5

Which of the following chemical strong oxidizing agent is used in COD test.

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KMnO4

H2SO4

CH3COOH

K2Cr2O7

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Question # 6

Which of the following pollutant result from roasting and heating processes.

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Dust

Smoke

Metal fumes

All above

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Question # 7

Which of the following process is involved in nitrogen flotation

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Non symmetric fixation of nitrogen

Fixation by soil bacteria

Fixation by yeast

Fixation by blue green algae

All above

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Question # 8

Which of the following is component of the ecosystem.

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Inorganic substances

ORGANIC Substances

Animal and plants only

All above

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Question # 9

Which of the following health effect is caused by cadmium.

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Hypertension

Cardiovascular problem

Kidney damage

All above

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Question # 10

Which of the following pollutant is not secondary pollutnat.

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SO3

NO2

SO2

Ozone

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Question # 11

Which of the following process is a source of nuclear pollution.

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Uranium mining

Uranium processing

Reactor waste

All above

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