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प्रश्न
Write down the composition of three main gases present in air by volume.
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उत्तर
| Composition of air by volume | |
| Nitrogen | 78% |
| Oxygen | 21% |
| Carbon dioxide | 0.03-0.04% |
| Inert gases | 0.9% |
| Water vapours | Variable |
| Bust particles | Variable |
| Other impurities | Variable |
OR
| Gases | Percentage | Figure |
| Nitrogen | 78% |  |
| Oxygen | 21% | |
| Carbon dioxide | 0.03-0.04% | |
| Inert gases | 0.9% | |
| Water vapours | Variable | |
| Bust particles | Variable | |
| Other impurities | Variable |
APPEARS IN
संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Name the following:
The component of air which does not support combustion.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Carbon dioxide, water vapour and energy in the form of heat are evolved during respiration.
What are the components of air?
Inhaled air contains a large amount of carbon-di-oxide.
The main component of air is oxygen.
Explain carbon dioxide and its uses.
A ______ gas that is used to remove carbon impurities from the steel.
Match the following
| 1. | Nitrogen | a. | Acid rain |
| 2. | CO2 | b. | Global warming |
| 3. | Melting of glaciers | c. | Volcanic gases |
| 4. | Corrosion of bridges | d. | Aerated drinks |
State whether the following statement is true or false. If false, correct them.
Air helps in the movements of sailing yachts and gliders but plays no role in the flight of birds and aeroplanes.
