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प्रश्न
Describe a simple experiment with the help of a diagram to show that Air occupies space
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उत्तर
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).
संबंधित प्रश्न
Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
Fill in the blank:
_____________ discovered the oxygen gas.
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
Air is a mixture and not a compound since the components of air cannot be separated by physical methods.
What will happen if the number of vehicles and factories in your surroundings increases?
Why is it said that-
Air is a homogeneous mixture of various gases.
State the meaning of the term atmosphere.
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
Paheli kept some water in a beaker for heating. She observed that tiny bubbles appeared before the water started to boil. She boiled the water for about 5 minutes and filled it in a bottle up to the brim and kept the bottle air tight till it cooled down to room temperature.
Why did the tiny bubbles appeared?
