Q.

Which one of the following solution has least freezing point ?

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a

0.2 m KCl

b

0.2 m NH2-CO-NH2

c

0.2 m C12H22O11

d

0.2 m CaCl2

answer is D.

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Detailed Solution

Depression of freezing point is a colligative property;Greater the concentration of the solution lesser the freezing point;T0-T∝ molality; Effective concentation in options 1,2,3,4 is 0.4 M, 0.2 M, 0.2 M and 0.6 M ;
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