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PPSC Chemistry Part V Environmental Chemistry Online Test MCQs With Answers

Question # 1

The most promising technique for solar production of electricity is.

Choose an answer

Dry cell

Battery

Solar cell

None of above

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Question # 2

Temporary hard water is softened on industrial scale by adding.

Choose an answer

Mg(OH)2

Ca(OH)2

KOH

NaOH

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Question # 3

In biological ecosystem which of the following substance is used by organisms.

Choose an answer

Water

Sunlight

Minerals

All above

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Question # 4

The expected specific waste of paper and allied products industry is.

Choose an answer

Chemicals

Paper and fibre residues

Links

All above

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Question # 5

Which of the following is atmospheric pollutant.

Choose an answer

CO2

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Question # 6

Water pollution is due to

Choose an answer

Agricultural discharges

Swages and other wastes

Industrial effects

All the above

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Question # 7

Which of the following process is involved in getting back nitrogen into atomosphere.

Choose an answer

Nitrification

Denitricication

Ammonification

All above

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Question # 8

Which of the following substance is most abundant of all components of atmospheric air.

Choose an answer

CO2

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Question # 9

Ozone hole refers to.

Choose an answer

Black hole

Decrease to thickness of ozone layer in stratosphere

Decrease of thickness of ozone in troposphere

Increase concentration of ozone in the atmosphere

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Question # 10

Which of the following statements is not related to the decomposition phenomenon occurring in nature.

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Decomposition is due to autotrophic organisms

Decomposition involves bacteria and fungi

During decomposition organisms carry out specific reactions

Many species of decomposer are present in the biosphere

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Question # 11

SO2 is generated from which of the following industry.

Choose an answer

Drying and packing

Paper

Pulp

paper and pulp

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