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प्रश्न
Explain the term vaporization.
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उत्तर
“Change of liquid to vapours (gas) on heating at constant temperature is called VAPORIZATION.”
When we heat a liquid, the temperature starts rising till it starts changing into vapours, and then the temperature remains constant for some time, though we are supplying heat. This heat supplied is being used to change every molecule of liquid into vapours and temperature does not rise till the whole of liquid is changed into vapours.
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संबंधित प्रश्न
The temperature at which a liquid gets converted into its vapour state is called its
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 boiling point.
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 |
Boiling of egg results in ______ change.
Choose the correct statement of the following
Which condition out of the following will increase the evaporation of water?
Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.
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.
