Question

Process of conversion of solid state directly into the gaseous state is called -

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

Answer 1

The correct option is A

Sublimation

The explanation for the correct option

(A) Sublimation

• Sublimation is a process in which a solid directly changes into gas and vice versa without coming into the liquid state.
• Examples of substances that sublimate are - Camphor, Naphthalene balls, Iodine, etc.

The explanation for the incorrect option

(B) Evaporation

• Evaporation is a process in which liquid changes into vapor (gas) below its boiling point.
• For example, Drying clothes.

(C) Melting

• Melting is a process in which solid changes into liquid at its melting point.
• For example, the melting of ice into the water at $0^{°}$ Celcius.

(D) Freezing

• Freezing is a process in which liquid changes into solid at its freezing point.
• For example, freezing water into ice at $0^{°}$ Celcius.

Thus, option (A) i.e., sublimation is the correct option.