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प्रश्न
Fill in the blank
Although we cannot see air, we can ___it.
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उत्तर
Although we cannot see air, we can feel it.
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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 |
How is greenhouse effect produced?
How is air useful to water boats?
Name three greenhouse gases.
Name the important scientists and their studies which led to the discovery of the components of air.
Explain Lavoisier’s experiment which provided evidence to the discovery of components in air.
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
Name a device which uses wind energy to generate electricity.
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Why did the tiny bubbles appeared?
