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PPSC Chemistry Part V Environmental Chemistry Online Test MCQs With Answers

Question # 1

Which of the following is a mode of controlling pollution in big cities.

Choose an answer

Cleanliness and less use of insecticides

Proper disposal of organic wastes, sewage and industrial effluents

Broader roads and shifting of factories out of the residential areas

All of above

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Question # 2

DDT is

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Biodegradable pollutant

Nodegradable contaminant

Air pollutant

An antibiotic

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Question # 3

Acid rain is caused due to increase in the concentration of _______ in the atmosphere

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Ozone and dust

CO2 and CO

SO3 and CO

SO2 and NO2

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Question # 4

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 # 5

Which of the following pose threat to historical monument Taj.

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Floods in Yamuna river

Temperature mediated spoilage of marble

Air pollutants from Mathura refinery

Weathering of marble

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Question # 6

Bioconversion of biomass can be used for.

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Heating purposes

Power production

Methane production

All of the above

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Question # 7

Which of the following statement is not related with the effect of thermal pollution.

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Decrease in BOD

Increase in BOD

Reduction in DO

Change in algal production

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Question # 8

Which of the following oxide formed in appreciable quantity in the atmosphere.

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NO2

N2O

All above

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Question # 9

Water is often treated with chlorine to

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Increases oxygen content

Kill germs

Cause sedimentation

Remove insoluble impurities.

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Question # 10

The unit of sound pressure level is

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Pascal

Decibel

Newton

Ampere

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Question # 11

The smog is essentially caused by the presence of.

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O3 and N2

O2 and N2

Oxides of sulphur and nitrogen

O2 and O3

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