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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 observation balloons. | (b) carbon acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
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उत्तर
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (e) Nitrogen |
| 2. A gas used for filling weather observation balloons. | (d) Helium |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (b) carbon acid |
| 5. A gas vital for respiration. | (a) Oxygen |
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
Fill in the blank:
_____________ discovered the oxygen gas.
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nitrogen
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Describe a simple experiment with the help of a diagram to show that Air has mass
Fill in the blank:
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Draw a neat labelled diagram for the following experiment.
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Cool and soothing wind: Breeze.
uproot trees wind: ______.
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
