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Q.

Ebullioscopic constant ( $K_{b}$ ) and cryoscopic constant ( $K_{f}$ ) depend on following factor:

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a

moles of solute added in solvent.

b

freezing point and boiling point of solvent respectively.

c

latent heat of vaporization and fusion of solvent respectively.

d

molar mass of solute added.

answer is D.

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Detailed Solution

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$K_{b} = \frac{{RT}_{0}^{2} M}{1000 H_{V}} K_{f} = \frac{{RT}_{0}^{2} M}{1000 H_{f}}$

So, $K_{b}$ and $K_{f}$ depends on heat of vaporization and fusion.

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