Air Pollution Test

Question 1
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Which of the following processes does not remove oxygen from the atmosphere?

A
Respiration

B
Burning of fuels

C
Dissolution in water bodies

D
Volcanic eruptions

Question 2

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Select the option that correctly fills the blanks in the given statements.

I. Air supports combustion because of the presence of __(i)__ gas in it.
II. The most abundant gas in the air is __(ii)__.
III. __(iii)__ and __(iv)__ keep the Earth warm even after sunset because they absorb some of the heat radiated by the Earth.
IV. __(v)__ is the most abundant noble gas in the air.

	(i)	(ii)	(iii)	(iv)	(v)
(1)	oxygen	water vapour	Carbon dioxide	methane	Xenon
(2)	ozone	nitrogen	Carbon monoxide	methane	Helium
(3)	oxygen	nitrogen	Carbon dioxide	Nitrogen dioxide	Neon
(4)	oxygen	nitrogen	Carbon dioxide	methane	Argon

(1)

(2)

(3)

(4)

Question 3
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It is lowest layer of the Earth's atmosphere; the temperature gets colder as the distance above the earth increases. This is also where most of the weather phenomena occur.

Which layer of the atmosphere is being discussed here?

A
Troposphere

B
Stratosphere

C
Mesosphere

D
Thermosphere

Question 4
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Directions For Questions

Consider the clues given below and identify the layer of the atmosphere that is being discussed.

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Ozone is abundant in this layer.

Ozone heats this layer as it absorbs energy from incoming ultraviolet radiation from the sun.

A
Thermosphere

B
Troposphere

C
Mesosphere

D
Stratosphere

Question 5
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Which pollutant(s) come(s) from mobile sources?

A
Hydrocarbons

B
Nitrogen oxides

C
Carbon dioxide

D
All of the above

Question 6
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Which of the following activities can help reduce the amounts of dangerous substances in the air?

A
Greater use of public transportation

B
Greater use of private cars

C
Use of leaded gasoline

D
Use of CNG

Question 7
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Directions For Questions

Analyse the two statements given below and select the correct option.

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Statement I: Carbon monoxide produced during incomplete combustion of fuels such as petrol and diesel is a poisonous gas.
Statement II: Carbon monoxide reduces the oxygen carrying capacity of the blood.

A
Both statements I and II are correct and statement II is the correct reason for I.

B
Both statements I and II are correct, but statement II is not the correct reason for I.

C
Statement I is correct, but statement II is incorrect.

D
Both statements I and II are incorrect.

Question 8
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Which of the following statements about photochemical smog are correct?

I. Photochemical smog is caused during summers.
II. It is caused by the release of hydrocarbons due to the incomplete combustion of fuels.
III. It may cause problems in the respiratory tract.

A
I and III

B
I and II

C
I, II and III

D
II and III