Question

A clear solution is heated in a china dish where upon a solid separates from the hot solution. It is due to the fact that
A. the solid has a positive enthalpy of solution
B. the solid has a negative enthalpy of solution
C. solvent has evaporated
D. the solute is volatile.

Answer 1

Correct Answer - A::C
(a ) If the solid has positive enthalpy of solution,its solubility will decrease with increase in temperature and the solid will separate out on heating.
(c) The solid can also separate out on the evaporation of the solvent.