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- 1. Multiple Choice
Major part of the air is constituted by
nitrogen
oxygen
carbon dioxide
inert gases
- 2. Multiple Choice
Which of the following gas helps in burning?
Nitrogen
Oxygen
Carbon dioxide
Carbon monoxide
- 3. Multiple Choice
Which of the following gas we use in breathing?
Carbon dioxide
Nitrogen
Oxygen
None of these
- 4. Multiple Choice
Wind is
air around us
rising hot air
air in motion
none of these
- 5. Multiple Choice
Air is present
in atmosphere
in soil
in water of ponds, lakes and seas
everywhere
- 6. Multiple Choice
The envelope of air that surrounds the earth is called ________
atmosphere
hydrosphere
lithosphere
- 7. Multiple Choice
Air is a mixture of many _________
solids
liquids
gases
- 8. Multiple Choice
___________ gas is necessary for burning
oxygen
nitrogen
carbon dioxide
- 9. Multiple Choice
__________ gas occupies the major part of composition of air.
nitrogen
oxygen
carbon dioxide
- 10. Multiple Choice
Which of these do plants need in order to make food?argoncarbon dioxidenitrogenoxygen - 11. Multiple ChoiceWhich of these makes up about 21 percent of the atmosphere?argoncarbon dioxidenitrogenoxygen
- 12. Multiple ChoiceWhat are the percentages of the main gases on Earth?78% oxygen, 21% nitrogen and 1% other78% other, 21% oxygen and 1% nitrogen78% nitrogen, 21% oxygen and 1% other95% carbon dioxide and 5% oxygen
- 13. Multiple Choice
What gas is released into the atmopshere when fossil fuels are burned?
oxygen
carbon dioxide
nitrogen
argon
- 14. Multiple Choice
Which gas makes up 78% of the atmosphere?
ozone
oxygen
nitrogen
water vapor
- 15. Multiple Choice
Which gas is released into the atmosphere by plants following photosynthesis?
Oxygen
Argon
Carbon dioxide
Nitrogen
- 16. Multiple Choice
What layer protects us from the sun's harmful rays?
protection layer
ozone layer
atmospheric layer
- 17. Multiple Choice
what is a water vapour
sweat
it is present in the air when it come with contact with cool surface rain comes
no, idea
condensation
- 18. Multiple Choice
which air supports burning
nitrogen
oxygen
argon
carbon di-oxide
- 19. Multiple Choice
Which is not a property of air?
It occupies space.
It is transparent.
It is a solution.
It is a compound.
- 20. Multiple Choice
Which of these is a quality of air?
Air takes up space
Air has a fixed shape
We can see air
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