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प्रश्न
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
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उत्तर
Air exerts pressure
- Take an open can, fill it with water, and heat it. On the formation of steam, place the cap on tightly and keep the can aside.
Observation: On condensation of the steam the pressure inside the can reduce. The air outside exerts pressure on the can which crumples slowly.
Conclusion: Air exerts pressure.
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 |
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Fill in the blank
Although we cannot see air, we can ___it.
Write ‘true’ or ‘false for the following;
Air is a compound.
A mixture has a variable composition. Give three other reasons why air is considered a mixture and not a compound.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
Which of the following statements is incorrect?
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
