Question

Evaporation is a _____________phenomena whereas boiling is a ____________phenomena.

• A. surface
• B. bulk

Answer 1

Evaporation:

• Evaporation is the phenomenon in which a substance changes its state from liquid to gas by applying heat.
• Evaporation is a surface phenomenon because in this the above water will evaporate from the whole water.

Boiling:

• Boiling is a bulk phenomenon because in this the particle of the bulk of liquid gain energy and then get converted into a gaseous or vapour state.

Therefore, Evaporation is a surface phenomenon whereas boiling is a bulk phenomenon.