Question

Can we reverse the following change? If yes, suggest the name of the method.
(a) Water into water vapour
(b) Water vapour into water
(c) Ice into water
(d) Curd into milk.

Answer 1

(a)

Water into water vapour : Yes, this process can be reversed. Water vapour can be converted to water through condensation.

(b)

Water vapour into the water: Yes, this process is reversible.Through evaporation, water can be converted to water vapour.

(c)

Ice into the water: Yes, this process is reversible. Water can be converted into ice by freezing.

(d)

Curd into milk: Curd forms through curdling of milk and this change cannot be reversed back. Hence, it is not a reversible change.