Answer: Option (B) is the correct answer.
Explanation:
Cooling the solvent will not increase the rate at which a solute dissolves because when we cool the solvent then the movement of particles decrease.
Therefore, there will be less interaction between the solute and solvent particles as a result the rate of dissolution decreases.
Whereas on crushing the solute the number of solute particles increases. Hence, there will be more interaction between solute and solvent particles and the rate of dissolution increases.
Also, on stirring the solvent there will be more interaction between solute and solvent particles. As a result, the rate of dissolution increases.
Upon heating the solvent, the particles of both solute and solvent get excited which will result in more interaction through the collision. Therefore, the rate of dissolution will increase.
