Question # 1

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

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

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CO₂ gas.

SO₂gas.

NO₂gases.

O₃gas.

Which factor determines the severity of a pollutant?

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Chemical nature

concentration

Persistence

All of them

Fossil fuel means.

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Coal

Petroleum

Natural gas

All of them

At the height 880120 km from earth's surface is.

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Troposphere

Mesosphere

Stratosphere

Thermosphere

Our planet earth consists of ____________ natural Spheres.

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1

4

6

8

Ozone id beneficial for us as it:

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absorbs infrared radiations

absorbs ultraviolet radiation

absorbs chlorofluorocarbons

absorbs air pollutants

Which one of the following is not air pollutants?

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N₂

CO

NO₂

O₂

How many percentage of sunlight is absorbed by atmosphere gases.

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12%

18%

24%

30%

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.

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

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lower stratosphere

middle stratosphere

upper stratosphere

troposphere

Which is not a poisonous gas?

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Ozone

Chlorine

Carbon di oxide

All of them

Which is the major effect of global warming?

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Increase in temperature.

Rise in sea level

Melting of glaciers

All of them

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