Question # 1

Mesophere extend forms 50 km to:

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50 km

12 km

60 km

85 km

The percentage by volume of nitrogen in dry gas is.

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78.09%

20.94%

0.93%

0.03%

Building and Monuments lose their beauty and shine due to

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U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

Forest fires and burning of wood emit.

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CO₂

NO₂

SO₂

Cl₂

Which is not a poisonous gas?

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Ozone

Chlorine

Carbon di oxide

All of them

Infrared radiations emitted by the Earth are absorbed by.

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CO₂ and H₂O

N₂ and O₂

CO₂and N₂

O₂and CO₂

What percentage of nitrogen and oxygen is in the atmosphere.

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69%

79%

9%

89%

Atmosphere is divided into;

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3 regions

4 regions

5 regions

6 regions

Atmospheric region found between 50-58 km from the earthis.

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Thermosphere

Stratosphere

Mesophere

Thermosphere

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

The process by which atmospheric nitrogen is turned into nitrates in the soil is called.

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Nitration

Fixing

Oxidation

Reduction

About 99% of atmospheric mass lies in.

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35 km

30 km

15 km

16 km

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