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प्रश्न
Which of the following statements is incorrect?
पर्याय
All living things require air to breathe.
We can feel air but we cannot see it.
Moving air makes it possible to fly a kite.
Air is present everywhere but not in soil.
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उत्तर
Air is present everywhere but not in soil.
Explanation:
Air is omnipresent and is present in soil too. This can be inferred by adding water to a pot filled with a lump of soil. After adding water it can be observed that the soil absorbs all the water and air bubbles are formed. These air bubbles show the escaping 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 |
Why can’t we see air?
Name three greenhouse gases.
Describe a simple experiment with the help of a diagram to show that Air occupies space
______ soil has pH 7.
With whom should I pair up?
| Group A | Group B | ||
| (1) | Air | (a) | Excretion |
| (2) | Water | (b) | Scattering of light |
| (3) | Soil | (c) | Plasticity |
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
What is the importance of air in transmission of sound?
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
Explain the following observations very briefly
The arrow of weather cock points towards a particular direction at a particular moment.
