Pollution of Air and Water Test

Result

Pollution of Air and Water Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

Green house effect can be reduced by:

A
growing trees and forests

B
use of faulty refrigerators

C
burning of fossil fuels

D
the use of natural gas

Solution

By growing trees and forests, we can reduce the level of carbon dioxide in the atmosphere to reduce the greenhouse effect.
Question 2
1 / -0

Growing more trees helps to ___________.

A
reduce $$O_2$$ in the environment

B
increase $$CO_{2}$$ in the environment

C
reduce $$CO_{2}$$ only in the environment

D
reduce $$CO_{2}$$ and increase $$O_{2}$$ in the environment

Solution

In photosynthesis, during day time green plants absorbs $$CO_2$$ and releases $$O_2$$.
So they reduce $$CO_{2}$$ and increase $$O_{2}$$ in the environment.
Therefore, option $$D$$ is correct.
Question 3
1 / -0

Water is often treated with chlorine to:

A
increase oxygen content

B
kill germs

C
remove suspended particles

D
remove hardness

Solution

To protect drinking water from disease-causing organisms or pathogens, water suppliers often add a disinfectant such as chlorine to it.

Chlorine kills pathogens such as bacteria and viruses.
Question 4
1 / -0

Greenhouse effect is mainly due to increase in the levels of:

A
$$O_{2}$$

B
$$CO$$

C
$$CO_{2}$$

D
$$N_{2}$$

Solution

A layer of carbon dioxide ($$CO_2$$) present in the atmosphere prevents the solar radiations (reflected by the earth's surface) from going out in the atmosphere. This heats up the earth's surface and results in the greenhouse effect.
Question 5
1 / -0

Greenhouse effect of global warming causes:

A
rise in temperature of earth

B
rise in pressure on earth

C
decrease in oxygen content earths atmosphere

D
decrease in $$CO_{2}$$ content

Solution

A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing solar radiation, thereby trapping and holding heat in the atmosphere.
The progressive heating up the surface of the earth is called the greenhouse effect or global warming. This effect increases the temperature of the earth.

Thus, the correct answer is option $$A$$.
Question 6
1 / -0

Unseasonal rains and cyclones are the results of:

A
Global warming

B
Acid rain

C
Increase of water pollution

D
Increase of $$CO$$

Solution

Global warming leads to two major changes:
1. Melting of polar ice caps, thus increasing the level of seawater. As a result, many coastal areas can get submerged.
2. Unseasonal rains, cyclones, and hurricanes occur due to the increased rate of evaporation of water.
So, the correct answer is option A.
Question 7
1 / -0

Which of the following is a recently originated problem of environment?

A
Ozone layer depletion

B
Green house effect

C
Global warming

D
All of the above
Solution
- If the ozone layer becomes depleted, then more UV rays will reach the Earth. Exposure to higher amounts of UV radiation could have serious impacts on human beings, animals and plants, like more skin cancers, sunburns and premature aging of the skin.
- Continued warming from the release of greenhouse gases (GHGs) into the atmosphere is expected to have a substantial impact on the environment, human health and the economy, like global warming, will decrease snow, sea ice and glacier coverage, resulting in rising sea levels and increased coastal flooding. Rising temperatures will also thaw permafrost in the Arctic.
- Effects of Greenhouse gases would eventually lead to the melting of ice worldwide, especially at the Earth's poles due to Global warming. This includes mountain glaciers, ice sheets covering West Antarctica and Greenland, and Arctic sea ice.
Question 8
1 / -0

The greenhouse effect is possible if the percentage of $$CO_{2}$$ is:

A
0.01 %

B
0.03 %

C
0.15 %

D
0.02 %

Solution

The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions.
Only above 0.03% of $$CO_2$$ causes green house effects.
Question 9
1 / -0

Melting of ice caps may be due to:
a) Depletion of the ozone layer
b) Global warming
c) Acid rain

A
a & b

B
b

C
c & a

D
c
Question 10
1 / -0

Which of the following is not a source of air pollution?

A
Automobile exhaust

B
Burning of firewood

C
Windmill

D
Power plant

Solution

Windmill are used to produce energy by the motion of wind, it is a renewable source of energy and does not cause air pollution.

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Re-Attempt Weekly Quiz Competition

Pollution of Air and Water Test - 18

Result

Pollution of Air and Water Test - 18

Score

-

Rank

-

SHARING IS CARING

Question 1

growing trees and forests

use of faulty refrigerators

burning of fossil fuels

the use of natural gas

Solution

Question 2

reduce $$O_2$$ in the environment

increase $$CO_{2}$$ in the environment

reduce $$CO_{2}$$ only in the environment

reduce $$CO_{2}$$ and increase $$O_{2}$$ in the environment

Solution

Question 3

increase oxygen content

kill germs

remove suspended particles

remove hardness

Solution

Question 4

$$O_{2}$$

$$CO$$

$$CO_{2}$$

$$N_{2}$$

Solution

Question 5

rise in temperature of earth

rise in pressure on earth

decrease in oxygen content earths atmosphere

decrease in $$CO_{2}$$ content

Solution

Question 6

Global warming

Acid rain

Increase of water pollution

Increase of $$CO$$

Solution

Question 7

Ozone layer depletion

Green house effect

Global warming

All of the above

Solution

Question 8

0.01 %

0.03 %

0.15 %

0.02 %

Solution

Question 9

a & b

b

c & a

c

Question 10

Automobile exhaust

Burning of firewood

Windmill

Power plant

Solution

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