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प्रश्न
Give two uses of the following component present in air:
oxygen
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उत्तर
Oxygen: For respiration and breathing no life is possible without oxygen. Oxygen is the most vital component which is responsible for two most important processes,
- Respiration and
- Combustion.
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संबंधित प्रश्न
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
What is greenhouse effect?
Give two uses of the following component present in air:
water vapour
State four steps to be taken to control air pollution.
Fill in the blank
Air is a ______ of gases
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
Tick (√) the correct alternative from the choice given for the following statement.
Rust is
What is meant by the term ‘atmosphere’? State the role played by the atmosphere for the survival of mankind.
Name the following.
Gases that are harmful to the ozone layer
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
