EASY
6th ICSE
IMPORTANT
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The two gases which, taken together, make up about 99 percent of the air are:

a. Nitrogen b. Carbon dioxide c. Ozone d. Oxygen

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Important Questions on Air and Atmosphere

EASY
6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>Test Your Understanding>Q 5
Which of the following is not a common component of air that we normally breathe in?
EASY
6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>Test Your Understanding>Q 6
Nitrogen is needed by the plants to make
MEDIUM
6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>Think & Answer>Q 1
What would happen if there is no tree on the Earth?
MEDIUM
6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 1

How can we release some of the air from the glass shown in the given diagram?

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MEDIUM
6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 2
The air over industrial cities has usually a higher amount of one of the following components than normal air. This component is:
EASY
6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 3
About one-fifth of ordinary air is:
EASY
6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 4
The component of air which is utilised by the plants in respiration is:
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6th ICSE
IMPORTANT
Lakhmir Singh's Science Chemistry>Chapter 5 - Air and Atmosphere>EXERCISES>Q 5
In an activity to show that air is mainly a mixture of two gases (nitrogen and oxygen), the carbon dioxide produced by the burning of candle in air is absorbed by dissolving a substance X in water in the trough. The substance X is :