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प्रश्न
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
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उत्तर
Lavoisier’s experiment for the discovery of oxygen. Set up in apparatus as shown in the figure. When mercury oxide is heated in the retort, oxygen is collected in bell jar.
Observation:
- A red layer was formed in the heated mercury surface in the retort.
- The level of mercury in the trough rose by 1/5.
Conclusion: The active part of air removed by mercury on heating was named ‘oxygen’.The remaining inactive part of air in the bell-jar was named nitrogen.
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संबंधित प्रश्न
What is greenhouse effect?
What is wind?
Give two uses of the following component present in air:
nitrogen
Give two uses of the following component present in air:
carbon dioxide
State four steps to be taken to control air pollution.
Give a brief account of the discovery of air and the scientists involved.
Name the following.
Inert gases in the air
What is the importance of air in transmission of sound?
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
