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प्रश्न
Fill in the blank
Although we cannot see air, we can ___it.
रिकाम्या जागा भरा
उत्तर
Although we cannot see air, we can feel it.
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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 |
Fill in the blank:
_____________ discovered the oxygen gas.
What do you observe when Carbon dioxide gas is passed through lime water.
Give two uses of the following component present in air:
oxygen
How is air useful to scooters and cars.?
Name two air pollutants which cause global warming.
Name three greenhouse gases.
Fill in the blank:
Nitrogen of the air is utilized by plants for formation of _____.
About 78% of the volume of air is ______.
Match the items of Column I with the items of Column II
| Column-I | Column-ll | ||
| (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 airflow |
| (e) | Wind | (v) | Prevent dust particles |
