EASY
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If the given pie chart represents the composition of air, which part of the chart represents nitrogen, oxygen and other gases.
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Important Questions on Air Around Us

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Science>Chemistry>Air Around Us>Composition of Air
 “A lot of indiscriminate activities of humans pollute the environment”- Support the statement by giving three examples in favour of it. Give examples of a national park and a biosphere reserve in West Bengal.
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Science>Chemistry>Air Around Us>Composition of Air
Which radiation coming from the sun, is prevented by the Ozone layer from falling on the earth’s surface?
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Science>Chemistry>Air Around Us>Composition of Air
Which of the following is not a pollutant?
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Science>Chemistry>Air Around Us>Composition of Air
Plants use carbon dioxide from the air for photosynthesis. How is the carbon dioxide in the air (or atmosphere) replaced?
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Science>Chemistry>Air Around Us>Composition of Air

Explain why a burning candle stops burning after some time when covered with an inverted gas jar.

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Science>Chemistry>Air Around Us>Composition of Air
Which of the following is necessary for burning things?
Argon, Carbon dioxide, Oxygen, Nitrogen, Helium
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Science>Chemistry>Air Around Us>Composition of Air
The air that we breathe in is rich in carbon dioxide.
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Science>Chemistry>Air Around Us>Composition of Air
Why do policemen regulating traffic at a crowded city road crossing often wear masks?
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Science>Chemistry>Air Around Us>Composition of Air
Which component of air acts as a supporter of combustion?
EASY
Science>Chemistry>Air Around Us>Composition of Air
Name the two main gases present in the air.
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Science>Chemistry>Air Around Us>Composition of Air
Apart from nitrogen and oxygen, name two other gases present in the air.
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Science>Chemistry>Air Around Us>Composition of Air
What is the importance of water vapour in the air?
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Science>Chemistry>Air Around Us>Composition of Air
How will you show that air (or oxygen) is necessary for burning?
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Science>Chemistry>Air Around Us>Composition of Air
Explain why, a burning coal fire stops burning after some time when covered with a vessel.
MEDIUM
Science>Chemistry>Air Around Us>Composition of Air
When it rains heavily, it is easy to find earthworms in the garden. Why?
EASY
Science>Chemistry>Air Around Us>Composition of Air
Name any one component of air which does not support burning.
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Science>Chemistry>Air Around Us>Composition of Air
Name the major component of the air
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Science>Chemistry>Air Around Us>Composition of Air
Which gas in the atmosphere is essential for respiration?
EASY
Science>Chemistry>Air Around Us>Composition of Air
Name the component of air which condenses on a cold surface to form drops of a liquid. What is this liquid?
EASY
Science>Chemistry>Air Around Us>Composition of Air

Which gas is needed for fire to burn?