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- 1. Multiple Choice
The Nitrogen Content in Air is........
88%
77%
21%
78%
78.8%
- 2. Multiple Choice
Why do Mountainers carry Oxygen cylinders with them because..........
The air is very cold in the Mountain
There is less oxygen in the mountains
Oxygen is required for burning
Oxygen is very important while trekking
- 3. Multiple Choice
Which of the following is not a property of Air?
Air is highly compressible
Air exerts pressure
Air is not matter because it cannot be seen
Air is a mixture of gasses
- 4. Multiple Choice
The component of air that supports burning is......
Oxygen
Nitrogen
Carbon Dioxide
Water Vapour
- 5. Multiple Choice
What is the composition of air is :
Nitrogen - 78% Oxygen - 21% Carbon Dioxide Other gasses and Dust - 0.03%
Nitrogen-78.8%
Oxygen-30%
Carbon Dioxide Other gasses and Dust - 0.04%
Nitrogen - 78%
Oxygen- 21%
Carbon Dioxide Other gasses and Dust - 0.02%
Nitrogen - 88%
Oxygen - 21%
Carbon Dioxide Other gasses and Dust - 0.03%
- 6. Multiple Choice
Which of the following is NOT present in air?
(a) Oxygen
(b) Nitrogen
(c) Helium
(d) Iron
A
B
C
D
- 7. Multiple Choice
The presence of water vapor in air is important for
(a) Water Cycle
(b) Ozone layer
(c) Photosynthesis
(d) None of the above
A
B
C
D
- 8. Multiple Choice
Wind is
(a) air around us
(b) rising hot air
(c) air in motion
(d) none of these
A
B
C
D
- 9. Multiple Choice
Which property of air is shown in the image
Bottle is soluble in water
Air is dissolved in water
No air is present in water
None of the above
- 10. Multiple Choice
What is the percentage of Oxygen and Nitrogen in the air?
98 %
99 %
97 %
100 %
- 11. 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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