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प्रश्न
Write ‘true’ or ‘false for the following;
Air is a compound.
विकल्प
True
False
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उत्तर
False
Correct Statement: Air is a mixture.
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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 |
What do you observe when Carbon dioxide gas is passed through lime water.
Give two uses of the following component present in air:
nitrogen
What is meant by ozone depletion?
While freezing, the ______ of water is lowered.
With whom should I pair up?
| Group A | Group B | ||
| (1) | Air | (a) | Excretion |
| (2) | Water | (b) | Scattering of light |
| (3) | Soil | (c) | Plasticity |
Draw a neat labelled diagram for the following experiment.
To prepare oxygen in the laboratory from hydrogen peroxide and a catalyst.
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
What is wind energy?
Make sentences using the given set of words.
Air, wind, motion, called
