Advertisements
Advertisements
प्रश्न
Differentiate between melting point and boiling point, giving atleast one example of each.
Advertisements
उत्तर
MELTING POINT:
The temperature at which a solid starts changing into LIQUID without further increase in temperature is called MELTING POINT.” Or The constant temperature at which solid changes into liquid.”
Example: Ice (solid) melts at 0°C into water (liquid) when heated.
BOILING POINT :
“The temperature at which a LIQUID start changing in vapour without a further rise in temperature.
Or
‘The constant temperature at which a LIQUID starts changing into GAS (vapours)
Example: Boiling point of water (liquid) is 100°C.
APPEARS IN
संबंधित प्रश्न
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?
It is difficult to cook vegetables on hills and mountains. Explain the reason.
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.
Why does the temperature of a substance remain constant during its melting point or boiling point?
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.
