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प्रश्न
What is global warming?
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उत्तर
The increased greenhouse effect is caused due to increase in air pollutants and it results in the average increase in temperature of the atmosphere. This is called Global warming.
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संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
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 |
What is wind?
Give two uses of the following component present in air:
carbon dioxide
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Mention five causes of air pollution.
Write ‘true’ or ‘false for the following;
Air is a compound.
Answer in your own words.
What are the various constituents of air? Write their uses.
Draw a neat labelled diagram for the following experiment.
To determine the component of air used up in burning, by using phosphorus and a bell jar.
______ is important for all living creatures.
