Pollution of Air and Water Test

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Pollution of Air and Water Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

Carbon exists in the atmosphere in the form of:

A
carbon monoxide only

B
carbon monoxide in traces and carbon dioxide

C
carbon dioxide only

D
coal

Solution

Carbon dioxide is a major component in the atmosphere (0.03%) and carbon monoxide is present in trace amounts.
Question 2
1 / -0

The two gases making the highest relative contribution to the greenhouse gases are:

A
$$CO_{2}$$ and $$CH_{4}$$

B
$$CH_{4}$$ and $$N_{2}O$$

C
$$CFC{s}$$ and $$N_{2}O$$

D
$$CO_{2}$$ and $$N_{2}O$$

Solution

The highest contribution to greenhouse gases is from $$CO_2 $$ ( $$60-80 \%)$$ and $$CH_4$$ ( $$14 - 20 \%$$) which absorbs more of the infrared rays and UV rays and causes global warming.
Question 3
1 / -0

Increased concentration of ______ in the air is believed to cause global warming.

A
nitrogen

B
oxygen

C
carbon dioxide

D
hydrogen

Solution

$$CO_2$$ absorbs most of the infrared rays and heats the earth surface thereby causing global warming.
Question 4
1 / -0

The greenhouse effect is caused by:
i) Accumulation of $$O_{2}$$ in the atmosphere
ii) Depletion of $$O_{3}$$ layer
iii) Accumulation of $$CO_{2}$$ in the atmosphere

A
i and ii

B
i only

C
iii only

D
i and iii
Solution
Greenhouse effect:
- The progressive heating up of the surface of the Earth is called the greenhouse effect or global warming.
- $$CO_2$$ and $$H_2O$$ block a part of the heat emitted by the Earth and reflect it back. Due to this, the Earth's surface gets heated up.
- 50% of $$CO_2$$ content of air can increase the surface temperature of the Earth by $$3^oC$$.
- In addition to $$CO_2$$, the other greenhouse gases are $$CFC$$ (17%), $$O_3$$ (18%), $$NO$$ (4%) and water vapour (2%).
Question 5
1 / -0

A pond contains clean water. Which of the following activities will produce least pollution of water?

A
Washing clothes in the pond

B
Animals bathing in the pond

C
Washing motor vehicles in the pond

D
Swimming in the pond

Solution

Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). This form of environmental degradation occurs when pollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful compounds.
So washing clothes, motor vehicles or bathing animals will discharge detergent and dirt into the clean water, hence polluting it, while swimming in the pond doesn't discharge that much pollutants or dirt into the clean water.
Question 6
1 / -0

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

A
Forest Conservation Day

B
Plantation month

C
Van Mahotsav

D
Wildlife week

Solution

Lakhs of trees are planted by people in July every year. The occasion is called Van Mahotsav.

So, option C is correct.
Question 7
1 / -0

The phenomenon of marble cancer is due to:

A
global warming

B
CFCs

C
fog

D
acid rain

Solution

Pollutants like sulphur dioxide and nitrogen dioxide in air react with water vapour present in the atmosphere to form sulphuric acid and nitric acid. These acids mix with rain, making it acidic. This acid rain corrodes building material like marble, and the phenomenon is called marble cancer. The other options, A, B, and C do not directly cause marble cancer.
Question 8
1 / -0

Which of the following is not a green house gas?

A
Nitrogen

B
Water vapour

C
Methane

D
Carbon dioxide

Solution

Water vapour, methane and Carbon dioxide are some of the examples of green house gases. Greenhouse gases trap heat in the atmosphere and warm the planet.
Nitrogen is not a green house gas as it doesn't show this property.
Question 9
1 / -0

Boojho wishes to contribute to reducing air pollution. Which vehicle should be used for going to school?

A
Car

B
School bus

C
Auto rickshaw

D
Scooter

Solution

By taking a school bus, more number of students can travel to school in a single vehicle. Thus, instead of traveling separately, if they travel together, they can save fuel and at the same time, cause less air pollution.
Question 10
1 / -0

John finds that, as he blows air into a balloon, it becomes bigger. What inference can John make?

A
Air is a gas

B
Air has mass

C
Air is matter

D
Air occupies space

Solution

When a balloon is filled with air then the air exerts force on the walls of the balloon. Due to this force the balloon material stretches and hence size of balloon increases.

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Re-Attempt Weekly Quiz Competition

Pollution of Air and Water Test - 19

Result

Pollution of Air and Water Test - 19

Score

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Rank

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SHARING IS CARING

Question 1

carbon monoxide only

carbon monoxide in traces and carbon dioxide

carbon dioxide only

coal

Solution

Question 2

$$CO_{2}$$ and $$CH_{4}$$

$$CH_{4}$$ and $$N_{2}O$$

$$CFC{s}$$ and $$N_{2}O$$

$$CO_{2}$$ and $$N_{2}O$$

Solution

Question 3

nitrogen

oxygen

carbon dioxide

hydrogen

Solution

Question 4

i and ii

i only

iii only

i and iii

Solution

Question 5

Washing clothes in the pond

Animals bathing in the pond

Washing motor vehicles in the pond

Swimming in the pond

Solution

Question 6

Forest Conservation Day

Plantation month

Van Mahotsav

Wildlife week

Solution

Question 7

global warming

CFCs

fog

acid rain

Solution

Question 8

Nitrogen

Water vapour

Methane

Carbon dioxide

Solution

Question 9

Car

School bus

Auto rickshaw

Scooter

Solution

Question 10

Air is a gas

Air has mass

Air is matter

Air occupies space

Solution

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