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प्रश्न
Name the following.
Gases that are harmful to the ozone layer
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उत्तर
Carbon tetrachloride
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 |
Discuss harmful effects of greenhouse effect.
What do you observe when Carbon dioxide gas is passed through lime water.
Fill in the blank
Air is a ______ of gases
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
State the meaning of the term Air
Explain the term ‘air pollution’, with reference to air quality. State the sources of a few main pollutants.
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
About 78% of the volume of air is ______.
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
