Question

Four processes are listed.
1. Brownian motion
2. Condensation
3. Diffusion
4. Evaporation
Which processes involve a change of state?

• A. $1$ and $2$
• B. $1$ and $3$
• C. $2$ and $4$
• D. $3$ and $4$

Answer 1

The correct option is C $2$ and $4$

Solution:- (C) $2$ and $4$

In evaporation, liquid changes it's state to gaseous state while in condensation, a gas changes it's state to liquid state.

Hence both involves change of state.