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प्रश्न
Give a brief account of the discovery of air and the scientists involved.
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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
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
Name two important processes supported by oxygen present in air.
What is meant by ozone depletion?
Fill in the blank
Air is a ______ of gases
Tick (√) the correct alternative from the choice given for the following statement.
Fuels which do not leave any residue on burning are
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
______ is important for all living creatures.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
