Pollution of Air and Water Test

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Pollution of Air and Water Test - 38

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Weekly Quiz Competition

Question 1
1 / -0

Compound used to remove bacteria from water is:

A
washing soda

B
baking soda

C
alum

D
bleaching powder

Solution

The compound used to remove bacteria from water is bleaching powder. Bleaching powder is a disinfectant. The disinfecting action is due to free chlorine obtained from bleaching powder. Chlorine destroys bacteria and prevents their re-growth.
Question 2
1 / -0

A technique used to determine the concentration of odour compounds in a sample is known as:

A
Stripping

B
Chlorination

C
Flushing

D
Settling

Solution

A technique used to determine the concentration of odour compounds in a sample is known as stripping.
Stripping analysis is an advanced technique for the identification of odorous compounds present in drinking water. A stripping technique permits high stripping temperatures without creating technical problems. It has been shown to increase significantly the number of odorous compounds detected by column sniffing.
Question 3
1 / -0

Which of the following is not greenhouse gas?

A
Water vapor

B
$$CO_2$$

C
Methane

D
Nitrogen

Solution

Greenhouse gases are as follow:
Water vapor
Carbon dioxide
Methane
Ozone
Nitrous oxide
Chlorofluorocarbons.
Oxygen and nitrogen are not greenhouse gases, because they are transparent to infrared light.
Hence, option D is correct.
Question 4
1 / -0

Identify the non-Green House Gas (GHG) from the following:

A
Methane

B
Nitrous oxide

C
Sulphur hexafluoride

D
Carbon monoxide

Solution

Carbon monoxide is a colorless, odorless, and tasteless gas that is slightly less dense than air. Carbon monoxide and other reactive gases are not considered as a direct greenhouse gas, because it does not absorb terrestrial thermal IR energy strongly enough.
Question 5
1 / -0

Which of the following industries are responsible for water pollution?

A
Oil refineries

B
Chemical factories

C
Textile and sugar mills

D
All of these

Solution

Oil refineries, chemical factories, textile and sugar mills are responsible for water pollution. These industries discharge harmful chemicals into rivers and streams and pollute water.
Question 6
1 / -0

Which of the following is a greenhouse gas?

A
$$SO_{2}$$

B
$$H_{2}S$$

C
$$CO_{2}$$

D
$$O_{2}$$

Solution

Greenhouse gas is any gas that has the property of absorbing infrared radiation (net heat energy) emitted from the earth's surface and reradiating it back to the earth's surface, thus contributing to the greenhouse effect.
Carbon dioxide is the gas that traps heat and restricts it from escaping from the atmosphere. So it is called a greenhouse gas. Other greenhouse gases are ozone, methane, etc.
Question 7
1 / -0

Which of the following is not a greenhouse gas?

A
Hydrogen

B
Carbon dioxide

C
Methane

D
Nitrous oxide

Solution

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Greenhouse gases cause the greenhouse effect on planets. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.
$$H_2$$ is not a greenhouse gas. Option A is the correct answer.
Question 8
1 / -0

Fish die in water bodies polluted by sewage due to:

A
large number of mosquitoes

B
increase in the amount of dissolved oxygen

C
decrease in the amount of dissolved oxygen in water

D
None of these

Solution

Sewage contains biodegradable waste which is degraded by bacteria with the help of dissolved oxygen. This results in a decrease in dissolved oxygen.
Since aquatic life depends on the dissolved oxygen. Fish die in water bodies polluted by sewage due to a decrease in dissolved oxygen.
Question 9
1 / -0

Global warming is due to greenhouse effect. The greenhouse gas include:

A
$$CO_2$$

B
Methane

C
Both a & b

D
Chlorine

Solution

Global warming is due to Green Effect due to an increase in the concentration of $$CO_2$$,$$CH_4$$by human activities like burning fossil fuels.
( Global warming in the overall temperature of the Earth's atmosphere due to the greenhouse effect caused by the increased levels of $$CO_2$$, $$CH_4$$ and other pollutants. )
Question 10
1 / -0

The gases associated with the green house effect is:

A
Carbon dioxide

B
Oxygen

C
Methane

D
Both A and C

Solution

The trapping of radiation by the earth’s atmosphere is called the greenhouse
effect. The gases responsible for it are known as greenhouse gases. The primary greenhouse gases in the earth's atmosphere are water vapour, carbon dioxide, methane, nitrous oxide.

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Re-Attempt Weekly Quiz Competition

Pollution of Air and Water Test - 38

Result

Pollution of Air and Water Test - 38

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SHARING IS CARING

Question 1

washing soda

baking soda

alum

bleaching powder

Solution

Question 2

Stripping

Chlorination

Flushing

Settling

Solution

Question 3

Water vapor

$$CO_2$$

Methane

Nitrogen

Solution

Question 4

Methane

Nitrous oxide

Sulphur hexafluoride

Carbon monoxide

Solution

Question 5

Oil refineries

Chemical factories

Textile and sugar mills

All of these

Solution

Question 6

$$SO_{2}$$

$$H_{2}S$$

$$CO_{2}$$

$$O_{2}$$

Solution

Question 7

Hydrogen

Carbon dioxide

Methane

Nitrous oxide

Solution

Question 8

large number of mosquitoes

increase in the amount of dissolved oxygen

decrease in the amount of dissolved oxygen in water

None of these

Solution

Question 9

$$CO_2$$

Methane

Both a & b

Chlorine

Solution

Question 10

Carbon dioxide

Oxygen

Methane

Both A and C

Solution

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