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प्रश्न
Name three greenhouse gases.
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उत्तर
Carbon dioxide, methane, nitrous oxide, etc.
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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 |
Mention five causes of air pollution.
Write ‘true’ or ‘false for the following;
Air is a compound.
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
While freezing, the ______ of water is lowered.
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
Take a squeezable bottle. Make a hole on the lid and close the bottle tightly. Bring the bottle near your face and press the bottle. What do you feel?
The layer of air around the earth is known as ______.
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
