Question

Depression in freezing point gets modified on association or dissociation of non-volatile solute as
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Answer 1

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According to Raoul's law, when a non-volatile solid is added to the solvent its vapour pressure decreases and now it would become equal to that of solid solvent at lower temperature. Thus, the freezing point of the solvent decreases.

Let T fo

Let T fo be freezing point of pure solvent

Let T fo be freezing point of pure solventT f=be freezing point of solution

Then, increase in freezing point

Answer 2

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