Advertisements
Advertisements
प्रश्न
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give two uses of the following component present in air:
water vapour
How is air useful to scooters and cars.?
Name two air pollutants which cause global warming.
Tick (√) the correct alternative from the choice given for the following statement.
Photosynthesis is a process in which plants
With whom should I pair up?
| Group A | Group B | ||
| (1) | Air | (a) | Excretion |
| (2) | Water | (b) | Scattering of light |
| (3) | Soil | (c) | Plasticity |
What is the importance of air in transmission of sound?
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
What is wind energy?
List five activities that are possible due to the presence of air.
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% |
