Advertisements
Advertisements
Question
Describe a simple experiment with the help of a diagram to show that Air occupies space
Advertisements
Solution
Air occupies space
- Press an inverted glass
- Tilt the tumbler to one side, tumbler over the water.
Observation: On tilting the tumbler, bubbles of air are seen coming out. Water slowly enters the tumbler to take place of the trapped air in the tumbler.
Conclusion: Air occupies space (the space in the tumbler was occupied by air).
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 |
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
Mention five causes of air pollution.
Tick (√) the correct alternative from the choice given for the following statement.
Fuels which do not leave any residue on burning are
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
State the meaning of the term atmosphere.
Fill in the blank:
Rusting is a chemical reaction which involves _____ oxidation.
______ is important for all living creatures.
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
Explain the following observations very briefly
A firki does not rotate in a closed area.
