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प्रश्न
Boiling takes place from the
पर्याय
the surface of the liquid
throughout the liquid
mid-portion of liquid
none of the above.
उत्तर
throughout the liquid
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संबंधित प्रश्न
Rapid conversion of water into steam is an example of
Differentiate between melting point and boiling point, giving atleast one example of each.
Explain the terms vaporization.
A liquid can change into vapour state at a fixed temperature.
A certain quantity of water is heated from 20°C to 100°C. Its temperature is recorded after each 1 minute. The observations are:
| Time (in minute) | Temperature (in °C) |
| 0 | 20 |
| 1 | 30 |
| 2 | 40 |
| 3 | 50 |
| 4 | 60 |
| 5 | 70 |
| 6 | 80 |
| 7 | 90 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
It is difficult to cook vegetables on hills and mountains. Explain the reason.
Assertion: The process of conversion of liquid water to its vapours by heating the liquid is called boiling.
Reason: The process of conversion of water vapours to liquid by cooling the vapours is called condensation.
Evaporation of a liquid at room temperature leads to a ____________ effect.
Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment.
Explain the terms boiling.
