Solutions Question 93
Question: The molal boiling point constant for water is $ {{0.513}^{o}}C,kg,mo{l^{-1}} $ . When 0.1 mole of sugar is dissolved in $ 200ml $ of water, the solution boils under a pressure of one atmosphere at [AIIMS 1991]
Options:
A) $ {{100.513}^{o}}C $
B) $ {{100.0513}^{o}}C $
C) $ {{100.256}^{o}}C $
D) $ {{101.025}^{o}}C $
Show Answer
Answer:
Correct Answer: C
Solution:
$ \Delta T_{b}=K_{b}\times m=0.513\times ( \frac{0.1}{200}\times 1000 ) $
$ =0.2565{{,}^{o}}C $ , $ T_{b}=100.256^{o}C $
