(i) less than the rate of crystallisation
(ii) greater than the rate of crystallisation
(iii) equal to the rate of crystallisation
(iv) zero
Correct Answer: (iii) equal to the rate of crystallisation
Explanation: Crystallization is the process of forming solid crystals that come from a solution. The solubility rate at the solvent liquid solvent is greater than the crystallization rate in unsaturated solution. The solubility rate at the solvent liquid solvent is below the crystallization rate in supersaturated solution. In equilibrium, the rate of solute dissolution in solvent liquid solvent is equal to the rate of crystallization.