Pollution of Air and Water (CBSE Class-8 Science): Questions 8 - 15 of 17

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Question number: 8

» Pollution of Air and Water » Air Pollution » CFCs

MCQ▾

Question

Pollutant used in refrigerators, air conditioners and aerosol sprays is

Choices

Choice (4) Response

a.

Oxides of nitrogen

b.

Methane

c.

CFC’s

d.

All of the above

Question number: 9

» Pollution of Air and Water » Air Pollution » How Does Air Get Polluted?

MCQ▾

Question

Green House gases create

Choices

Choice (4) Response

a.

Acid rain

b.

Pollution

c.

Green House effect

d.

All of the above

Question number: 10

» Pollution of Air and Water » Water Pollution » Ganga Action Plan

MCQ▾

Question

GAP is a:

Choices

Choice (4) Response

a.

Ground water pollution

b.

Ganga action plan

c.

Garbage Action plan

d.

Ground water Action Plan

Question number: 11

» Pollution of Air and Water » Water Pollution » How Does Water Get Polluted?

MCQ▾

Question

Water gets polluted due to:

Choices

Choice (4) Response

a.

Direct sources

b.

Indirect sources

c.

Both a. and b. are correct

d.

None of the above

Question number: 12

» Pollution of Air and Water » Air Pollution » What Is Air Pollution

MCQ▾

Question

Air pollution is defined as:

Choices

Choice (4) Response

a.

Addition of unwanted and harmful substances in the air

b.

Contamination of air by impurities

c.

All of the above

d.

None of the above

Question number: 13

» Pollution of Air and Water » Air Pollution » How Does Air Get Polluted?

MCQ▾

Question

The substances which contaminate the air are called as:

Choices

Choice (4) Response

a.

Air pollutants

b.

Dust particles, Smoke and carbon monoxide

c.

Volcanic activities

d.

Methane, Radon gas

Question number: 14

» Pollution of Air and Water » Air Pollution » Smog

MCQ▾

Question

Smog is the combination of the:

Choices

Choice (4) Response

a.

Smoke and fog

b.

Smoke and carbon monoxide

c.

Rain mixed with sulphur dioxide and nitrogen dioxide

d.

Pollution caused by chemicals

Question number: 15

» Pollution of Air and Water » Air Pollution » How Does Air Get Polluted?

MCQ▾

Question

Efforts made to reduce pollution from mobile sources include:

Choices

Choice (4) Response

a.

Using smokeless sources of energy

AND

Plantation of new trees

b.

Use of electrostatic precipitator

c.

Automobiles use should be lessened

d.

All a. , b. and c. are correct

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