Advertisements
Advertisements
Question
Name the components of air with their approximate percentage by volume in air. Does the percentage by volume of each component remain the same, in the atmosphere of different parts of the world? Explain with reasons.
Advertisements
Solution
The main components of the air are :
- Nitrogen
- Oxygen
Composition of air by volume:
Nitrogen: 78% or 4/5 th
Oxygen: 21% or 1/5 th
Carbon dioxide: 0.03 - 0.04%
Inert gases: 0.9%
[Water vapours, dust particles, other impurities]: variable
OR
| Gases | Percentage | Figure |
| Nitrogen | 78% |  |
| Oxygen | 21% | |
| Carbon dioxide | 0.03 - 0.04% | |
| Inert gases | 0.9% | |
| Water vapour | Varies | |
| Dust particles | Varies | |
| Other impurities | Varies |
Air is a mixture whose composition varies at different intervals of time and different places of the world.
RELATED QUESTIONS
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
Answer the question put against the following constituents of air :
Water vapours : Explain their role in modifying the earth’s climate.
Suggest five measures to prevent air pollution.
What do you observe when Calcium is heated and then tested with moist blue and red litmus – paper?
Write ‘True’ or ‘False’ in front of following statement.
The area where a lot of fuel burns has more percentage of carbon dioxide.
Name the following:
The component of air which does not support combustion.
Tabulate the various components of air, including the components with variable composition.
Explain why mountaineers carry oxygen cylinders with them?
______ is necessary for all acids.
State whether the following statement is true or false. If false, correct them.
Plants consume oxygen for respiration.
