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Q.

Kf of 1,4-dioxane is 4.9 mol-1 for 1000 g. The depression in freezing point for a 0.001 m solution in dioxane is 

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a

0.0049

b

4.9 + 0.001

c

4.9

d

0.49

answer is A.

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Detailed Solution

ΔT=Kf×Molality = 4.9×0.001=0.0049 K

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