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प्रश्न
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
जोड़ियाँ मिलाइएँ
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उत्तर
| Column I | Column II | ||
| (a) | Weather cock | (iv) | Direction of air flow |
| (b) | Mountaineers | (iii) | Oxygen cylinders |
| (c) | Fine hair inside the nose | (v) | Prevent dust particles |
| (d) | Smoke | (i) | Gases and fine dust particles |
| (e) | Wind | (ii) | Sailing yacht |
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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 |
Fill in the blank:
_____________ discovered the oxygen gas.
Name three greenhouse gases.
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Name the following.
Inert gases in the air
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The pressure exerted by air is called atmospheric pressure.
Mention two advantages of wind energy.
Take a squeezable bottle. Make a hole on the lid and close the bottle tightly. Bring the bottle near your face and press the bottle. What do you feel?
List five activities that are possible due to the presence of air.
About 78% of the volume of air is ______.
