Phase Change
Trending Questions
Q.
When the ice from a frozen lakes starts to melt, the temperature of the surroundings ______.
Increases
Decreases
Remains same
Increases or decreases as it depends on the amount of the ice which gets melted
Q.
The boiling point of the water is defined as:
None of these
The constant temperature at which water changes to steam
The constant pressure at which water changes to steam
The constant volume at which water changes to steam
Q. Calculate the amount of heat required to convert 1.00 kg of ice at −10∘C into steam at 100∘C at normal pressure. (Sice=2100 J kg−1K−1,
Swater=4200 J kg−1K−1,
Lf, ice=3.36×105 J kg−1,
Lv, water=2.25×106 J kg−1)
Swater=4200 J kg−1K−1,
Lf, ice=3.36×105 J kg−1,
Lv, water=2.25×106 J kg−1)
6.03×106 J
3.03×106 J
4.03×106 J
5.03×106 J
Q.
Which among these contract on melting?
Lead
Wax
Ice
Iron
Q. A lump of ice (0.1 kg) at −10∘C is put in 0.15 kg of water at 20∘C. How much water will be found in the mixture when it has reached thermal equilibrium?
(Cice=0.5 k cal kg−1k−1, Lice=80 k cal kg−1)
(Cice=0.5 k cal kg−1k−1, Lice=80 k cal kg−1)
- 150 g
- 31.25 g
- 181.25 g
- 210 g
Q.
For a pure substance, boiling point and condensation point are the same.
True
False
Q. When the solid changes into a liquid, there is no change in:
- Temperature
- Average kinetic energy of the molecules
- Intermolecular force of attraction
- Average distance between the molecules
Q. When ice melts into water at 0∘C, its volume will
- remain the same
- increase significantly
- decrease
- increase slightly
Q.
The constant temperature at which solid changes to a liquid called as
Q. The constant temperature at which solid changes to a liquid is called as ___ point.
- boiling
- melting
- freezing
- vaporization