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Question
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
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Solution
We will observe randomly moving dust particles in the beam of light. This confirms the presence of dust particles in the air.
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RELATED QUESTIONS
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 Carbon dioxide gas is passed through lime water.
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Name two air pollutants which cause acid rain.
What will happen if the amount of water vapour in the air increases.
State the meaning of the term Air
Draw a neat labelled diagram for the following experiment.
To study the presence of carbon dioxide in air.
List five activities that are possible due to the presence of air.
