question_answer 33)

  Choose the correct statement of the following. (a) Conversion of solid into vapours without passing through the liquid state is called vaporization. (b) Conversion of vapours into solid without passing through the liquid state is called sublimation. (c) Conversion of vapours into solid without passing through the liquid state is called freezing. (d) Conversion of solid into liquid is called sublimation.

Answer:

  (b) Conversion of solid into vapours on heating or vapours into solid on cooling without undergoing in liquid state is called sublimation. The conversion of liquid into gas (vapour) is called vaporization. The conversion of liquid into solid is called freezing. The conversion of solid into liquid is called melting.