Question

Rapid conversion of liquid into its gaseous state is called

• A. Melting
• B. Boiling
• C. Evaporation
• D. Sublimation

Answer 1

The correct option is B

Boiling

The explanation for the correct option:

Boiling:

1. Boiling is a process of rapid conversion of a liquid into a gaseous state at a particular temperature.
2. When heat is supplied to a liquid, its molecules gain more kinetic energy and start moving faster.
3. At a certain temperature the molecules gain sufficient energy to overcome the inter-molecular forces of attraction and escape into the space above the liquid.

The explanation for the incorrect option:

Option (A):

Melting:

1. Melting is a process in which a solid changes to liquid at a particular temperature.

Option (C):

Evaporation:

1. Evaporation is a process in which a liquid gradually turns into its gaseous state.
2. Evaporation is a surface phenomenon i.e. it occurs at the surface of the liquid.

Option (D):

Sublimation:

1. Sublimation is a process in which a solid directly turns to liquid without coming into the liquid state.

Thus, option B is correct.