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प्रश्न
How is air useful to windmills?
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उत्तर
Windmills work where there is sufficient movement of air.
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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 observation balloons. | (b) carbon acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphur acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Define the following:
Respiration
Define rusting?
How is air useful to scooters and cars.?
State what do you understand by the term ‘air’. Explain its importance to mankind.
Answer in your own words.
What are the various constituents of air? Write their uses.
The composition of air is always exactly the same.
Make sentences using the given set of words.
Air, wind, motion, called
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
The ______ makes the windmill rotate.
