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प्रश्न
Write the chemical name of Lime water
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उत्तर
Calcium hydroxide Ca(OH)2
These droplets were present in the air as moisture which got condensed on the cooler walls of a glass tumbler. This shows the presence of water vapours in 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 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 |
Why can’t we see air?
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
Name the following.
Gases that are harmful to the ozone layer
What is the importance of air in transmission of sound?
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
Mention two uses of air.
The composition of air is always exactly the same.
List five activities that are possible due to the presence of air.
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.
