Pollution of Air and Water Test

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Pollution of Air and Water Test - 42

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Weekly Quiz Competition

Question 1
1 / -0

The industrial cause of polluting river Ganga is

A
bathing

B
discharging harmful chemicals

C
throwing garbage, flowers, idols of gods and goddesses

D
None of these

Solution

Many industries discharge harmful chemicals into rivers and streams, causing the pollution of rivers like the Ganga. Examples are oil refineries, paper factories, textile and sugar mills, etc.
Option $$B$$ is correct.
Question 2
1 / -0

The pie chart shows the different gases that contribute to the total composition of air.
What atmospheric gas does the area marked as R in the pie chart represent?

A
Nitrogen

B
Carbon dioxide

C
Oxygen

D
Water vapour

Solution

The area marked as R shows the atmospheric gas-Nitrogen. Nitrogen is the most abundant gas. It comprises about $$78.08\%$$ of our atmosphere thus comprising the most about of our atmosphere.
Question 3
1 / -0

The Ganga action plan aimed ________.

A
to increase the water level of Ganga

B
to build a bridge on Ganga river

C
to reduce the pollution level in the river Ganga

D
to increase trade through the Ganga river

Solution

The Ganga action plan was launched in 1985. It aimed to reduce the pollution level in the river Ganga.
Question 4
1 / -0

The graph given here shows the rise in global temperature from $$1850$$ to $$2019$$.
How will this affect the earth?

A
An increase in temperature will cause a reduction in the emission of greenhouse gases

B
An increase in temperature will cause glaciers to melt and sea levels to rise dramatically

C
An increase in temperature will lead to repair and thickening of the ozone layer

D
An increase in temperature will lead to better crop production and food security

Solution

Global warming is the gradual heating of Earth's surface oceans and atmosphere caused by activities of human-like burning of fossil fuel deforestation etc. The increase in global annual temperature leads to the melting of glaciers which increases the sea level drastically causing destruction.
Hence, option D is the correct answer.
Question 5
1 / -0

Assertion (A): Acid rain reduces the fertility of the soil.
Reason (R): Acid rain has a corroding effect on marble buildings.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

B
Both Assertion and Reason are correct but Reason is not correct explanation for Assertion

C
Assertion is correct and Reason is incorrect

D
Assertion is incorrect and Reason is incorrect

Solution

Acid rain inhibits the activity of symbiotic nitrogen-fixing bacteria present in the nodules of the leguminous family. Hence, acid rain reduces the fertility of the soil.
Acid rain has a corroding effect on marble buildings. Sulphuric acid present in acid rain reacts with calcium carbonate present in the marble.
$$CaCO_3+H_2SO_4 \rightarrow CaSO_4 + H_2O + CO_2 \uparrow$$
Question 6
1 / -0

Which among the following gas is most responsible for global warming?

A
Nitrogen

B
Methane

C
Carbon dioxide

D
Carbon monoxide

Solution

Carbon dioxide is a byproduct of combustion of fossil fuel. It is a greenhouse gas contributing to global warming.
Question 7
1 / -0

Gases referred as 'greenhouse gases' are:

A
$$CO_2,\ O_2,\ NO_2,\ NH_3$$

B
chlorofluorocarbon, $$CO_2,\ NH_3,\ N_2O$$

C
$$CH_4,\ N_2,\ CO_2,\ NH_3$$

D
chlorofluorocarbon, $$CO_2,\ CH_4,\ N_2O$$

Solution

The most significant greenhouse gases are water vapour (H$$_2$$O), carbon dioxide (CO$$_2$$), methane (CH$$_4$$) and nitrous oxide (N$$_2$$O). Chlorofluorocarbons (CFCs), once used as refrigerants and aerosol propellants until they were phased out by international agreement, are also greenhouse gases.
Question 8
1 / -0

According to WHO, the soft water has 0 to _____ milligram per litre as $$CaCO_3.$$

A
60

B
120

C
180

D
150

Solution

Concentration as $$CaCO_3$$ Indication
0 to 60 mg/L Soft water
60 to 120 mg/L Moderately hard water
120 to 180 mg/L Hard water
>180 mg/L Very hard water
The following values are used to give an indication about water hardness.
Question 9
1 / -0

Water that can be used for drinking known as_____

A
salt water

B
potable water

C
sewage water

D
chemical water

E
none of these

Solution
Question 10
1 / -0

Exchange of radiations that keep Earth warm is known as:

A
ozone layer depletion

B
greenhouse effect

C
depletion of ozone layer

D
None of the above

Solution

The exchange of outgoing and incoming radiations that keep Earth warm is known as the greenhouse effect.
Hence option $$B$$ is correct.

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Concentration as $$CaCO_3$$	Indication
0 to 60 mg/L	Soft water
60 to 120 mg/L	Moderately hard water
120 to 180 mg/L	Hard water
>180 mg/L	Very hard water

Pollution of Air and Water Test - 42

Result

Pollution of Air and Water Test - 42

Score

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Rank

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SHARING IS CARING

Question 1

bathing

discharging harmful chemicals

throwing garbage, flowers, idols of gods and goddesses

None of these

Solution

Question 2

Nitrogen

Carbon dioxide

Oxygen

Water vapour

Solution

Question 3

to increase the water level of Ganga

to build a bridge on Ganga river

to reduce the pollution level in the river Ganga

to increase trade through the Ganga river

Solution

Question 4

An increase in temperature will cause a reduction in the emission of greenhouse gases

An increase in temperature will cause glaciers to melt and sea levels to rise dramatically

An increase in temperature will lead to repair and thickening of the ozone layer

An increase in temperature will lead to better crop production and food security

Solution

Question 5

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Both Assertion and Reason are correct but Reason is not correct explanation for Assertion

Assertion is correct and Reason is incorrect

Assertion is incorrect and Reason is incorrect

Solution

Question 6

Nitrogen

Methane

Carbon dioxide

Carbon monoxide

Solution

Question 7

$$CO_2,\ O_2,\ NO_2,\ NH_3$$

chlorofluorocarbon, $$CO_2,\ NH_3,\ N_2O$$

$$CH_4,\ N_2,\ CO_2,\ NH_3$$

chlorofluorocarbon, $$CO_2,\ CH_4,\ N_2O$$

Solution

Question 8

60

120

180

150

Solution

Question 9

salt water

potable water

sewage water

chemical water

none of these

Solution

Question 10

ozone layer depletion

greenhouse effect

depletion of ozone layer

None of the above

Solution

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