Question # 1

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

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lower stratosphere

middle stratosphere

upper stratosphere

troposphere

Which gas is not present in atmosphere?

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Nitrogen

Oxygen

Helium

Carbon dioxide

Which of the following is a poisonous gas.

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Oxygen

Ozone

Nitrogen

Carbon dioxide

Which gas is also known as life gas for plants.

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CO

CO₂

O₂

NO₂

Global warming causes rising of the sea level. The cause of global warming is.

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

Iron and steel structure are damaged by.

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Carbon monoxide

Sulphur dioxide

Methane

Carbon dioxide

Atmosphere is divided into;

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3 regions

4 regions

5 regions

6 regions

The region of ozone decomposition in stratosphere is.

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20 km

30 km

40 km

50 km

Global warming is because of.

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Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

Incinerator reduces solid waste into .

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Ash

Flue gas

Heat

All of them

Which is not a poisonous gas?

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Ozone

Chlorine

Carbon di oxide

All of them

Percentage of nitrogen in atmosphere is:

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20.94%

78.09%

0.93%

0.03%

Which metal present in acid rain affect the aquatic life by clogging fish gills?

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Lead

Chromium

Aluminium

Mercury

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