EASY
Earn 100

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Study the composition of air shown in the picture and answer the below question.

What is the normal percentage of carbon dioxide in air? 

Important Questions on Natural Resources-Air,Water and Land

MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>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>Natural Resources-Air,Water and Land>Air
Which radiation coming from the sun, is prevented by the Ozone layer from falling on the earth’s surface?
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Which of the following is not a pollutant?
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Explain why, if the clothes of a person catch fire accidently, he is covered with a woollen blanket. Give reason for your answer.
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air

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

EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Name any one component of air which does not support burning.
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air
The air that we breathe in is rich in carbon dioxide.
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Explain why, a burning coal fire stops burning after some time when covered with a vessel.
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Which of the following is necessary for burning things?
Argon, Carbon dioxide, Oxygen, Nitrogen, Helium
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Name the major component of the air
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Apart from nitrogen and oxygen, name two other gases present in the air.
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Air
What is the importance of water vapour in the air?
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Air
How will you show that air (or oxygen) is necessary for burning?
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Why do plants need nitrogen?
MEDIUM
Science>Chemistry>Natural Resources-Air,Water and Land>Air
When it rains heavily, it is easy to find earthworms in the garden. Why?
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>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>Natural Resources-Air,Water and Land>Air
Which gas in the atmosphere is essential for respiration?
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Science>Chemistry>Natural Resources-Air,Water and Land>Air
Name the two main gases present in the air.
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air
Which gas is given to the patients having breathing problems?
EASY
Science>Chemistry>Natural Resources-Air,Water and Land>Air

Which gas is needed for fire to burn?