Question # 1

99% of atmosphere consists of .

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N₂and H₂

N₂and O₂

N₂and CO₂

O₂and CO₂

Just above the Earth's surface is

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Mesosphere

Stratosphere

Theremosphere

Troposphere

The layer above troposphere extend upto 50 kilometers called.

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Mesosphere

Hydrosphere

Stratosphere

Thermosphere

Which one of the following is not an air pollutants?

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Nitrogen

Carbon dioxide

Nitrogen oxide

Ozone

ozone depletion (i.e O3--------------> O2 + O) occurs in:

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lower stratosphere

middle stratosphere

upper stratosphere

troposphere

Which pollutant is not found in car exhaust gases?

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CO

O₃

NO₂

SO₃

Almost all aircrafts fly in:

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troposphere

mesosphere

stratosphere

themosphere

Cause of global warming is:

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CO₂gas

SO₂gas

NO₂gas

O₂gas

The pH of water containing CO₂ is

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4-6

5.6-6

6-7

7-8

Major portion of ozone layer is foun in.

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Which is not a part of flue gas?

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Furans

Dioxins

HCl

H₂SO₄

Which gas is emitted due to volcanic eruption?

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CO₂

SO₃

NO₂

H₂

Infrared radiations emitted by the Earth are absorbed by.

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CO₂ and H₂O

N₂ and O₂

CO₂and N₂

O₂and CO₂

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