Question # 1

Fungicides are teh pesticides which

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Control the growth of fungus

Kill insects

Kill plant

Kill herbs

On earth polar ice caps and glacier contains H2O

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1%

2%

3%

10%

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

The smog which have high contents of SO2 in it, is called.

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Reducing smog

Oxidizing smog

Natural smog

Neutral smog

The disease can be eradicated by using pesticides.

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Malaria

Yellow fever

Sleeping sickness

All of these

Thickness of atmosphere is about how much kilometer above the surface of warth

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100 km

1000 km

10,000 km

unlimited

In purification of potable water the coagulant used is

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Nickel sulphate

Copper sulphate

Barium sulphate

Alum

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

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5

3

4

2

Peroxyacetylnitrate (PAN) is an irritant to human 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

Thickness of the atmosphere is

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100 km

500 km

1000 km

1500 km

The avoid teh formation of toxic compounds with chlorine which substance is used for disinfecting water.

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KMnO4

O3

Alum

Chloramines

Photochemical smog mainly consist of

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Higher hydrocarbons

Oxidising agnts

Reducing agent

All of these

Peroxyacetyl nitrate (PAN) is a irritant to human beings and it affects

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Eyes

Ears

Stomach

Nose

The residence time of NO is

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Few hours

1 day

3 days

4 days

A single chloride free radical can destroy how many ozone molecules.

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100

100000

10000

10

Water is disinfected by a substance to avoid toxification

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KMnO₄

Alums

O₃

Cl₂

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