A) 0.1 m sucrose
B) 0.1 m urea
C) 0.1 m ethanol
D) 0.1 m glucose
Correct Answer: C
Solution :
[c] From the relation, \[\Delta {{T}_{f}}=i{{K}_{f}}m,\]it is evident that \[\Delta {{T}_{f}}\propto i\] Since i is maximum for ethanol (others are non electrolytes), \[\Delta {{T}_{f}}\](depression in freezing point) will be maximum for \[{{C}_{2}}{{H}_{5}}OH\] and hence freezing point will be minimum for ethanol solution.
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