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प्रश्न
Describe a simple experiment with the help of a diagram to show that Air is highly compressible
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उत्तर
Air is highly compressible
- A leak-proof syringe filled completely with air only (i.e. empty) is taken.
Observation: On pressing the piston of the syringe, the piston moves inwards. Air (gas) inside the syringe has maximum inter-molecular space and is highly compressible.
Conclusion: Air is highly compressible.
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 |
Discuss harmful effects of greenhouse effect.
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
What is wind energy?
Mention two uses of air.
Wind does not help in the movement of which of the following?
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
