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प्रश्न
Name two air pollutants which affect our health.
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उत्तर
Two air pollutants that affect our health are:
- DUST
- SMOKE
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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 |
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The substance which accelerates the speed of a reaction without itself undergoing any change is called
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Gases that are harmful to the ozone layer
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Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
