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प्रश्न
How is air useful to scooters and cars.?
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उत्तर
Air filled tyres of cars move smoothly on road as there is less friction.
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संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
What was the ancient belief regarding the nature of matter ?
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Give two uses of the following component present in air:
carbon dioxide
Define the following:
Respiration
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Tick (√) the correct alternative from the choice given for the following statement.
Which of the following is not a greenhouse gas?
Name the important scientists and their studies which led to the discovery of the components of air.
About 78% of the volume of air is ______.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
