Solutions Question 340
Question: Which of the following has the lowest freezing poin'
Options:
A) 0.1 m sucrose
B) 0.1 m urea
C) 0.1 m ethanol
D) 0.1 m glucose
Show Answer
Answer:
Correct Answer: C
Solution:
From the relation, $ \Delta T_{f}=iK_{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_2H_5OH $ and hence freezing point will be minimum for ethanol solution.
