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- 1. Multiple Choice
Meaning of smoke
Air with carbon-monoxide
Air pollution
Air we breath
Air with dust particles
- 2. Multiple Choice
Major part of the air is constituted by
Nitrogen
Neon
Carbon dioxide
Oxygen
- 3. Multiple Choice
Air moving with gentle speed
Wind
Breeze
Sand storm
Oxygen
- 4. Multiple Choice
Which of the following gasses helps in burning
Nitrogen
Ozone
Oxygen
Helium
- 5. Multiple Choice
Short form of Oxygen
H2O
CO2
O2
N
- 6. Multiple Choice
Which gas is used for human survival in the earth
Oxygen
Water vapor
Breeze
Dust particles
- 7. Multiple Choice
The trees use ----------- gas for breathing
CO2
H2O
O2
NONE OF THESE
- 8. Multiple Choice
Air is a mixture of --------
oxygen
gas
Nitrogen
gases
- 9. Multiple Choice
Name the three green house gases
Carbon dioxide
Nitrous oxide
Water vapor
Methane
- 10. Fill in the Blank
Liquid nitrogen is used for -------
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