Question

Boiling occurs only on the surface of liquid.

• A. True
• B. False

Answer 1

The correct option is B False

Here think about the word ‘only’ here. Evaporation is a surface phenomenon. But what about boiling?

Let's recall the definition of boiling to answer this question.

Boiling is a special case of evaporation. It is the rapid conversion of a liquid into vapour by means of formation of bubbles.
During boiling, vaporization is not restricted to the surface only but takes place throughout the bulk of the liquid.

It involves the formation of bubbles even below the surface within the bulk of the liquid.