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Test: Pollution of Air & Water- 1


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20 Questions MCQ Test Science & Technology for UPSC CSE | Test: Pollution of Air & Water- 1

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Test: Pollution of Air & Water- 1 - Question 1

The process of waste treatment is called

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 1

The process of waste treatment is called sewage treatment. During this process impurities are removed by filtration, sedimentation and chlorination.

Test: Pollution of Air & Water- 1 - Question 2

Which of the following is not a green house gas?

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 2

A gas that contributes to the greenhouse effect by absorbing infrared radiation is known as greenhouse gas. Nitrogen is a part of atmospheric gases and it will not contribute to greenhouse effect.

Test: Pollution of Air & Water- 1 - Question 3

Percentage of nitrogen gas in air is

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 3

Nitrogen gas is present in atmosphere in maximum amount that is about 78% followed by oxygen and carbon dioxide.

Test: Pollution of Air & Water- 1 - Question 4

Which of the following is not a way to conserve water?

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 4

Reduce, reuse and recycle is the formula to conserve natural resource. Replace is not the way to conserve water.

Test: Pollution of Air & Water- 1 - Question 5

Which gas is produced on burning of fossil fuels?

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 5

On burning of fossil fuel carbon dioxide gas is mainly produced. Some amount of sulphur dioxide and nitrogen oxide is also produced.

Test: Pollution of Air & Water- 1 - Question 6

A number of peoples are suffering from respiratory disease due to

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 6

Polluted air contains a number of harmful gases as well as particulate matter floating in air. These gases and suspended particulate matter go to respiratory organs to cause disease.

Test: Pollution of Air & Water- 1 - Question 7

The water that is purified and fit for drinking is called

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 7

The water that is purified and fit for drinking is called potable water. Portable water contains a small amount of useful salts.

Test: Pollution of Air & Water- 1 - Question 8

Finer hair inside the nose

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 8

Fine hairs are present inside the nostril that filters the dust particles while inhaling the air. The mucus inside also prevent entry of dust particles.

Test: Pollution of Air & Water- 1 - Question 9

Incomplete combustion of fuel such as petrol and diesel gives

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 9

Carbon monoxide is produced by the incomplete combustion of fuels like wood, coal, kerosene, petrol and diesel.

Test: Pollution of Air & Water- 1 - Question 10

We cannot survive a few minutes without

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 10

Air(Oxygen) is crucial to sustaining life. Though it varies from person to person, on an average, 3 minutes is the maximum time where the person can stay alive without oxygen.

Test: Pollution of Air & Water- 1 - Question 11

The phenomenon of marble cancer is due to

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 11

Marble cancer is the phenomenon of corrosion of buildings and monuments due to effect of acid rain.

Test: Pollution of Air & Water- 1 - Question 12

There is acute shortage of water due to

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 12

The acute shortage of water is due to growing population and overuse of water. The sources of water remain same but population has grown many fold.

Test: Pollution of Air & Water- 1 - Question 13

Sea water is unfit for drinking because it contains

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 13

Sea water is unfit for drinking because it contain large amount of dissolved salts. Sea water cannot be used for even washing the clothes as foam is not formed in such water.

Test: Pollution of Air & Water- 1 - Question 14

Water can be conserved by

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 14

Water can be conserved by rain water harvesting. During this process, rain water is allowed to go inside the earth to increase water table.

Test: Pollution of Air & Water- 1 - Question 15

Last stage in treatment of sewage is

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 15

Sewage treatment involves primary, secondary and tertiary treatment during which different kinds of impurities are removed. The last stage in treatment is chlorination in which microbes are killed by chlorine.

Test: Pollution of Air & Water- 1 - Question 16

Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 16

Van Mahotsav is an annual tree planting festival in the month of July. During this festival thousand of trees are planted all over India.

Test: Pollution of Air & Water- 1 - Question 17

Water is the most common __________.

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 17

Water is the most common solvent as it dissolves almost all kinds of solute. Water is also called as universal solvent.

Test: Pollution of Air & Water- 1 - Question 18

 Which of the following gases can result in the formation of acid rain?

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 18

Oxides of sulphur i.e., sulphur dioxide and sulphur trioxide gases present in air combine with moisture and form acids, which come down along with rain water. This is called acid rain.              

Test: Pollution of Air & Water- 1 - Question 19

Gases and fine dust particle together make the

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 19

Smoke is the combination of fine dust particles along with gases like carbon dioxide in air.

Test: Pollution of Air & Water- 1 - Question 20

Most of rivers in India are polluted due to

Detailed Solution for Test: Pollution of Air & Water- 1 - Question 20

In India, main reason for pollution of rivers is addition of untreated sewage directly into water bodies that contain a number of pollutant.

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