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प्रश्न
Choose the correct statement of the following
विकल्प
conversion of solid into vapours without passing through the liquid state is called sublimation.
conversion of vapours into solid without passing through the liquid state is called vapourisation.
conversion of vapours into solid without passing through the liquid state is called freezing.
conversion of solid into liquid is called sublimation.
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उत्तर
conversion of vapours into solid without passing through the liquid state is called vapourisation.
undergoing in liquid state is called sublimation. The conversion of liquid into gas (vapour) is called vaporisation. The conversion of liquid into solid is called freezing. The conversion of solid into liquid is called melting.
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संबंधित प्रश्न
The temperature at which a liquid gets converted into its vapour state is called its
State the boiling point of water.
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 |
How is the boiling point of water affected when some salt is added to it?
A pressure cooker is based on the principle that boiling point of water increases with the ______.
Boiling of egg results in ______ change.
Which condition out of the following will increase the evaporation of water?
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.
Assertion (A): No-new substance is formed when water is heated to get steam.
Reason (R): Conversion of water into steam is a physical change.
