Which of the following solutions in not in equilibrium with the solid substance?

Options

A. Saturated solution
B. Supersaturated solution
C. Unsaturated solution
D. both (2) and (3)

Answer

4

Explanation

A saturated solution that contains undissolved solid solute is in a state of dynamic equilibrium, which means that at every instant some of the dissolved ions (if the solute is an ionic compound) come of the solution in solid form and an equal number of ions from the solid are entering the solution.