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प्रश्न
Describe a simple experiment with the help of a diagram to show that Air exerts pressure
उत्तर
Air exerts pressure
- Take an open can, fill it with water, and heat it. On the formation of steam, place the cap on tightly and keep the can aside.
Observation: On condensation of the steam the pressure inside the can reduce. The air outside exerts pressure on the can which crumples slowly.
Conclusion: Air exerts pressure.
संबंधित प्रश्न
Discuss harmful effects of greenhouse effect.
What do you observe when a burning candle is covered with an inverted jar.
A mixture has a variable composition. Give three other reasons why air is considered a mixture and not a compound.
Answer in your own words.
What are the various constituents of air? Write their uses.
While freezing, the ______ of water is lowered.
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
Match the items of Column I with the items of Column II
| Column-I | Column-ll | ||
| (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 airflow |
| (e) | Wind | (v) | Prevent dust particles |
