Solutions Question 62
Question: The amount of urea to be dissolved in 500 ml of water (K =18.6 K $ mol{e^{-1}} $ in 100g solvent) to produce a depression of $ {{0.186}^{o}}C $ in freezing point is [MH CET 2000]
Options:
A) 9 g
B) 6 g
C) 3 g
D) 0.3 g
Show Answer
Answer:
Correct Answer: C
Solution:
$ \Delta T_{f}=\frac{100\times K\times w}{m\times W} $
$ \therefore ,0.186=\frac{100\times 18.6\times w}{60\times 500} $
$ w=3g $
