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प्रश्न
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
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उत्तर
Calcium carbonate – CaCO3
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
How is greenhouse effect produced?
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 |
Name two air pollutants which cause acid rain.
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Tick (√) the correct alternative from the choice given for the following statement.
Which of the following is not a greenhouse gas?
How is light scattered by the air?
Draw a neat labelled diagram for the following experiment.
To demonstrate the burning of sulphur in a jar of oxygen.
Air has no ______ & ______.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
Explain the following observations very briefly
A firki does not rotate in a closed area.
