What will happen if the ozone layer disappears?

B. Infrared rays reach the earth

With altitude, air pressure ?

D. First increases then decreases

Everyday Science · Environment, Weather & Ecology · page 1 of 8

Atmosphere MCQs with Answers

Includes 14 past paper MCQs (marked).

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Atmosphere MCQs (1–10)

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Past paper MCQs in this chapter · See all past papers

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1.
Past Paper MCQ
Which of the following are ozone depleting substances?
Correct Answer: A. Chlorofluorocarbons (CFCs)
One-liner
Chlorofluorocarbons (CFCs) are the primary ozone-depleting substances among the given options.
2.
Past Paper MCQ
The infrared radiation emitted by the sun is strongly absorbed by:
Correct Answer: B. Water
One-liner
Infrared radiation from the sun is strongly absorbed by water (water vapour in the atmosphere).
3.
Past Paper MCQ
What is the approximate height of Earth's atmosphere?
Correct Answer: D. 6,200 miles
One-liner
The approximate height of Earth's atmosphere is 6,200 miles (about 10,000 km).
4.
Past Paper MCQ
Ozone layer protects us from the harmful _ of the Sun.
Correct Answer: D. Ultraviolet rays
One-liner
The ozone layer protects us from the harmful ultraviolet rays of the Sun.
5.
Past Paper MCQ
The ozone layer prevents _ radiation from entering the atmosphere.
Correct Answer: D. Ultraviolet
One-liner
The ozone layer prevents ultraviolet radiation from entering the atmosphere.
6.
The depletion of ozone layer is mainly due to the reaction of ozone (O3) with _?
Correct Answer: A. Chlorofluorocarbons (CFCs)
One-liner
The depletion of the ozone layer is mainly due to the reaction of ozone (O3) with Chlorofluorocarbons (CFCs).
7.
What will happen if the ozone layer disappears?
Correct Answer: D. UV Rays reach the earth
One-liner
If the ozone layer disappears, UV Rays reach the earth in harmful amounts, endangering all life forms.
8.
Which of the following is a major consequence of the use of Chlorofluorocarbons (CFCs)?
Correct Answer: B. Ozone layer depletion
One-liner
The major consequence of the use of Chlorofluorocarbons (CFCs) is ozone layer depletion.
9.
Force exerted on a person by atmosphere is _?
Correct Answer: B. 200,000 N
One-liner
The force exerted by the atmosphere on an average adult human body is approximately 200,000 N.
10.
With altitude, air pressure ?
Correct Answer: A. Decreases
One-liner
With altitude, air pressure decreases because the weight of the overlying air column becomes smaller.

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Atmosphere MCQs with Answers

Atmosphere MCQs (1–10)

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