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प्रश्न
Give a brief account of the discovery of air and the scientists involved.
उत्तर
- John Mayow (1674) proved air has two components – active and inactive components.
- Lavoisier (1789) named the active component as oxygen and inactive component as nitrogen
- Other scientists (1800's) discovered noble gases, \[\ce{CO2}\], water vapours.
संबंधित प्रश्न
What do you observe when Carbon dioxide gas is passed through lime water.
Give two uses of the following component present in air:
nitrogen
Give two uses of the following component present in air:
water vapour
State two similarities and two differences between respiration and burning.
Name two air pollutants which cause acid rain.
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
A mixture has a variable composition. Give three other reasons why air is considered a mixture and not a compound.
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
About 78% of the volume of air is ______.
In a number of musical instruments, air plays an important role. Can you name some such instruments?
