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प्रश्न
State the meaning of the term atmosphere.
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उत्तर
The atmosphere is a layer that extends about 300 kms above earth’s surface.
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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 |
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 a beam of light is allowed to enter in a closed dark room through a small hole.
Water does not have a ______ but has definite ______ and ______.
State whether the following statement is true or false.
The pressure exerted by air is called atmospheric pressure.
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Draw a neat labelled diagram for the following experiment.
To determine the component of air used up in burning, by using phosphorus and a bell jar.
______ is important for all living creatures.
Do sailors need the help of wind to sail?
About 78% of the volume of air is ______.
