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PPSC Chemistry Part V Environmental Chemistry Online Test MCQs With Answers

Question # 1

Which of the following responsible for depletion of ozone layer in upper strata of the atmosphere.

Choose an answer

Polyhalogens

Ferrocene

Freons

Fullerencs

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Question # 2

Water pollution is due to

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Agricultural discharges

Swages and other wastes

Industrial effects

All the above

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Question # 3

Which of the following compounds has fishing ordure

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ammonia

Organic sulphides

Amines

H2S

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Question # 4

Which of the following statement is not relevant with nitrous oxide.

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It is a colorless and odourless gas

It is non toxic gas

It is present in the atmosphere in higher concentration

It has high reactivity in the lower atmosphere

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Question # 5

DDT is

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Biodegradable pollutant

Nodegradable contaminant

Air pollutant

An antibiotic

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Question # 6

Which of the following level is an indicator of hearing loss.

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> 25 dB

< 25 dB

<20 dB

None of these

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Question # 7

In plant noise control, which of the following method is used for reducing noise

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Plant planning

Control at the source

Control of radiated noise

All above

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Question # 8

Photochemical smog is caused primarily by

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CO2

NO2

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Question # 9

Which of the following is not chemical characteristics of water.

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COD

BOD

Colour

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Question # 10

Which of the following statement is not correct with respect to hardness of water.

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It is due to soluble salts of Na

it is due to soluble salts of Ca

It is due to soluble salts of Mg

It is due to soluble salts of Fe

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Question # 11

The reduction in ozone layer would lead to

Choose an answer

Temperature chages

Rainfall failure

Increase uv radiation on earth

All above

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