Question # 1

Disinfection of water by chlorine is done by the production of.

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NH2Cl

NCl2

HOCl

NHCl2

Ozone is mostly produced in

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Tropical region

North polar region

South polar region

Thermosphere zone of atmosphere

Whcih water will be considered as polluted water.

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High value of COD

Low value of COD

High value of DO

Low value of BOD

The disease can be eradicated by using pesticides.

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Malaria

Yellow fever

Sleeping sickness

All of these

The news paper can be recycled again and again as many times as

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5

3

4

2

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

The pH range of the acid rain is.

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7-6.5

6.5-6

6-6.5

Less than 5

Peroxyacetyl nitrate is an irritant to humab beings and it affects

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Eyes

Ears

Stomach

Nose

Which field produces significant amount of methane in the atmosphere

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paddy field

Cotton field

Can sugar field

Wheat field

The main pollutant of leather tanneries in the waste water is due to

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Lead

Chromium VI

Copper

Chromium III

The residence time of NO is

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Few hours

1 day

3 days

4 days

A quality of raw water is improved by

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Reduction

Aeration

Dehydration

Incineration

Which one is primary pollutant.

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Peroxyacetyl nitrate

Sulphuric acid

Carbonic acid

Carbon monoxide

Ecosystem is smaller units of.

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Lithosphere

Hydrosphere

Atmosphere

Biosphere

Acid rain fist of all was observed by

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Augus Smith

Robert Hook

Mosley

Watson

In which layer of atmosphere, ozone is present.

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Thermosphere

Mesosphere

Stratosphere

Troposphere

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects

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eyes

ears

stomach

nose

The region of earth capable of supposing life is called.

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Atmosphere

Bisphere

Dithosphere

Hydrosphere

The mean residence time of methane in atmosphere in

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1-2 years

3-4 years

3-5 years

3-7 years

Which is a secondary pollutant

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Carbonic acid

CO₂

SO₂

CO

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