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

A strange bitter smell noticed near photocopiers is of:

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SO2

H2S

O2

O3

Almost all air crafts fly in which reion?

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Incinerator reduces solid waste into .

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Ash

Flue gas

Heat

All of them

Which gas protects the Earth's surface from ultraviolet radiations?

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CO₂

CO

N₂

O₃

Major portion of ozone layer is foun in.

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Troposphere

Stratosphere

Mesosphere

Thermosphere

What percentage of nitrogen and oxygen is in the atmosphere.

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69%

79%

9%

89%

Mesophere extend forms 50 km to:

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50 km

12 km

60 km

85 km

Fossil fuel means.

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Coal

Petroleum

Natural gas

All of them

Which one of the following is not an air pollutants?

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Nitrogen

Carbon dioxide

Nitrogen oxide

Ozone

PAN stands for

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Poly aniline nitrate

Proxy acetyl nitrate

Poly acetyl nitrite

Proxy acetyl nitrite

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

The pH of water containing CO₂ is

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4-6

5.6-6

6-7

7-8

Which one of the following is not air pollutants?

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N₂

CO

NO₂

O₂

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