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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 |
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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 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 |
Tick (√) the correct alternative from the choice given for the following statement.
Fuels which do not leave any residue on burning are
Give a brief account of the discovery of air and the scientists involved.
Describe a simple experiment with the help of a diagram to show that Air occupies space
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
With whom should I pair up?
| Group A | Group B | ||
| (1) | Air | (a) | Excretion |
| (2) | Water | (b) | Scattering of light |
| (3) | Soil | (c) | Plasticity |
Name the important scientists and their studies which led to the discovery of the components of air.
Air has no ______ & ______.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Air is a ______ of some gases.
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
