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प्रश्न
State four steps to be taken to control air pollution.
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उत्तर
Four steps are taken to control air pollution:
- Tall chimneys are installed in factories and powerhouses so that smoke and gases rise high and get diluted.
- GROW more tall trees to absorb CO2 Also plants help in bringing rains.
- Use unleaded petrol and CNG in all public transport vehicles
- Industries should be located far away from residential areas.
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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 |
Fill in the blank
Air is a ______ of gases
Tick (√) the correct alternative from the choice given for the following statement.
Rust is
Describe a simple experiment with the help of a diagram to show that Air has mass
What is the importance of air in transmission of sound?
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
Mention two uses of air.
The process of conversion of iron into hydrated form of oxides is called _______.
______ 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.
