Question # 1

Which gas is produce by the electrical lightening of air.

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NO

SO₂

SO₃

CO₂

The formula of ozone is.

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O₂

O₃

O

CO

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

The stratosphere layer is at height above the earth's surface.

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0-12 km

12-50 km

50-85 km

65-120 km

Which one of the following is not air pollutant.

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CO₂

CO

NO₂

O₂

By the increase in the concentration of CO₂ in air.

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Decrease in heat energy

Increase in heat energy.

Heat energy remains same

None of them

The envelope of different gases around the earth is called.

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Atmosphere

Brosphere

Lithosphere

Hydrosphere

The smell of photocopies machine is due to the presence of.

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Chlorine gas

Neon gas

Helium gas

Ozone gas.

The gas used by animals to perform respiration.

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O₂

N₂

SO₂

Cl₂

PAN stands for

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Poly aniline nitrate

Proxy acetyl nitrate

Poly acetyl nitrite

Proxy acetyl nitrite

Major portion of ozone layer is foun in.

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Forest fires and burning of wood emit.

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CO₂

NO₂

SO₂

Cl₂

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