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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
Differentiate between melting point and boiling point, giving atleast one example of each.
Explain the term 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 |
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 ______.
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.
Water into steam on heating is called freezing.
The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in kelvin scale?
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.
Evaporation of a liquid at room temperature leads to a ____________ effect.
The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called ____________.
Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.
We would have observed that the plate that covers the cooked food items has water droplets inside. Why? Explain.
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.
