Question # 1

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

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eyes

ears

stomach

nose

Fungicides are the pesticides which

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Control the growth of fungus

Kill insects

Kill plants

Kill herbs

The disease can be eradicated by using pesticides.

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Malaria

Yellow fever

Sleeping sickness

All of these

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

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Lead

Chromium VI

Copper

Chromium III

The minimum temperature of troposphere is.

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-2^oC

-56^oC

-100^oC

15^oC

Ecosystem is smaller unit of

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Lithosphere

Hydroshpere

Amosphere

Biosphere

The region of earth capable of supposing life is called.

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Atmosphere

Bisphere

Dithosphere

Hydrosphere

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

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100

100000

10000

10

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

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5

3

4

2

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

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Eyes

Ears

Stomach

Nose

Fungicides are teh pesticides which

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Control the growth of fungus

Kill insects

Kill plant

Kill herbs

Which one is primary pollutant.

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Peroxyacetyl nitrate

Sulphuric acid

Carbonic acid

Carbon monoxide

Acid rain fist of all was observed by

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Augus Smith

Robert Hook

Mosley

Watson

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 pH of truly acidic rain is

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7-6.8

6.5-6

6-5.6

less than 5

In purification of potable water the coagulant used is

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Nickel sulphate

Copper sulphate

Barium sulphate

Alum

Thickness of the atmosphere is

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100 km

500 km

1000 km

1500 km

Which field produces significant amount of methane in the atmosphere

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paddy field

Cotton field

Can sugar field

Wheat field

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