Question # 1

The recombination of O and O₂ in mid stratosphere is an

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Exothermic reaction

Endothermic reaction

Heat absorbing process

None of these

Depending upon temperature variation, atmosphere ins divided into how many regions?

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1

2

3

4

Just above the Earth's surface is

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Mesosphere

Stratosphere

Theremosphere

Troposphere

In the bacterial decay, the compound of which element are emitted.

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Sulphur

Carbon

Nitrogen

All of them

What gas is the major constituent of troposphere?

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Nitrogen

Oxygen

Hydrogen

Both a and b

Which one of these pollutants are not found in car exhaust fumes?

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CO₂

O₃

NO₂

SO₂

Infrared radiation emitted by the earth are absorbed by?

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CO₂,H₂O

N₂,O₂

CO₂,N₂

O₂,CO₂

Ozone layer is not found is

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Upper stratosphere

Mid stratosphere

Lower stratosphere

All of them

Our planet earth consists of ____________ natural Spheres.

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1

4

6

8

A group of gases that maintains temperature of atmosphere is.

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Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

Normaily rain water is weakly acidic because.

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SO₃

CO₂

CO₃

NO₂

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

Building and Monuments lose their beauty and shine due to

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U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

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