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:
nitrogen
Give two uses of the following component present in air:
water vapour
Answer in your own words.
What are the various constituents of air? Write their uses.
Water does not have a ______ but has definite ______ and ______.
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
State the meaning of the term atmosphere.
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 |
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
In a number of musical instruments, air plays an important role. Can you name some such instruments?
Make sentences using the given set of words.
Air, wind, motion, called
