In the depression of freezing point experiment, it is found that the\

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$(\mathrm{a}, \mathrm{d})$ : When a solute is added to a solvent there occurs a depression in freezing point of solvent.\ Raoult's law states, "When a non-volatile solute is added to a solvent, the vapour pressure of the solvent decreases". At freezing point only the solvent molecules will solidify.\