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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
विकल्प
only oxygen
only nitrogen
only carbon dioxide
all of these
MCQ
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उत्तर
all of these
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संबंधित प्रश्न
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| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
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| 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 |
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