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प्रश्न
Explain the terms boiling point.
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उत्तर
The temperature at which a liquid starts changing into vapors or gas at a constant temperature is called its boiling point.
संबंधित प्रश्न
Rapid conversion of water into steam is an example of
Explain the term vaporization.
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 |
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 ______.
The boiling point of water is defined as ______.
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.
What is the physical state of water at 100°C.
By the process of Heating of water, ______ is obtained.
Water into steam on heating is called freezing.
Choose the correct statement of the following
Which condition out of the following will increase the evaporation of water?
____________ is the change of solid state directly to vapour state without going through the ____________ state.
Why does the temperature of a substance remain constant during its melting point or boiling point?
We would have observed that the plate that covers the cooked food items has water droplets inside. Why? Explain.
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.
A liquid changes into a gas at a constant temperature known as its ______.
