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प्रश्न
Fill in the blank
Polluted air is harmful to ____.
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उत्तर
Polluted air is harmful to health.
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संबंधित प्रश्न
What is greenhouse effect?
Discuss harmful effects of greenhouse effect.
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 |
What is wind?
Write the chemical name of Lime water
Water does not have a ______ but has definite ______ and ______.
Name a device which uses wind energy to generate electricity.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
Make sentences using the given set of words.
Air, wind, motion, called
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.
Do you think tiny bubbles will appear on heating the water taken out from the bottle? Justify your answer.
