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- 1. Multiple Choice
Major part of the air is constituted by ?
Nitrogen
Oxygen
Carbon dioxide
Inert gases
- 2. Multiple Choice
What is air ?
A mixture
A pure substance
An element
Anything , that depends on the place where it is found
- 3. Multiple Choice
Envelope of air that surrounds the earth is known as .
Biosphere
Atmosphere
Environment
Ecosystem
- 4. Multiple Choice
Which is not a property of air ?
It occupies space
It is transparent
It is a solution
It is a compound
- 5. Multiple Choice
Air is everywhere . It is present evn in the empty bottle .
Air does not have any colour and it is transparent .
Air has weight
Air occupies space
- 6. Multiple Choice
Contains few gases and fire dust particles .
Wind
Vapour
Atmosphere
Smoke
- 7. Multiple Choice
Mountaineers carry cylinders with them .
Carbon Dioxide
Nitrogen
Water
Oxygen
- 8. Multiple Choice
What is the percentage of nitrogen and oxygen in air ?
98 %
99 %
97 %
100 %
- 9. Multiple Choice
Which of the following processes need oxygen ?
Combustion
Respiration
Oxidation
All of Above
- 10. Multiple Choice
When we heat water , we find bubbles coming from it . This shows that -:
Water contains air
Air contains water
Water itself converts into bubbles
Water contains dissolved minerals
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