CBSE Class 12 Chemistry 2023 Delhi Set 2 Solved Paper

Question : 3 of 12

Marks: +1, -0

Which of the following aqueous solution will have highest boiling point?

$1.0 {\M} {\KCl}$
$1.0 {\M} {\K}_2 {\SO}_4$
$2.0 {\M} {\KCl}$
$2.0 {\M} {\K}_2 {\SO}_4$

Solution:

The elevation in boiling point is a colligative property that is changed by adding of impurity

{K}_2 {SO}_4 \→ 2 {K}^{+}+{SO}_4^{2-}

{i}=3 \text "(i = vant Hoft factor) "

When higher impurities are present in a solution, the boiling point of solution increases which is directly proportional to molality of the solute and vant Hoff factor of the solution.

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