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प्रश्न
Evaporation of a liquid at room temperature leads to a ____________ effect.
उत्तर
Evaporation of a liquid at room temperature leads to a Cooling effect.
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संबंधित प्रश्न
Explain the terms vaporization.
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.
A pressure cooker is based on the principle that boiling point of water increases with the ______.
By the process of Heating of water, ______ is obtained.
A sample of water under study was found to boil at 102°C at normal temperature and pressure. Is the water pure? Will this water freeze at 0°C? Comment.
____________ is the change of solid state directly to vapour state without going through the ____________ state.
Assertion (A): Burning of a candle is considered a physical as well as chemical change.
Reason (R): Melting of wax is a physical change melted wax turns into vapours and then bums which is a chemical change.
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.
Explain the terms boiling.
