Calculate the boiling point of a solution containing $0.61\text{ g}$ of benzoic acid (Molar mass $= 122\text{ g mol}^{-1}$) in $5\text{ g}$ of $\text{CS}_2$ in which it dimerises to the extent of 88%. The boiling point and $K_{\text{b}}$ of $\text{CS}_2$ are $46.2\text{ }^\circ\text{C}$ and $2.3\text{ K kg mol}^{-1}$ respectively.

Year	Paper Code	Set	Position
CBSE 2026	Series 56-1	Set 1	Question 24
CBSE 2026	Series 56-1	Set 2	Question 28
CBSE 2026	Series 56-1	Set 3	Question 22

• Step 1: Stating the fundamental formula / law statement (+1 Mark)
• Step 2: Intermediate mathematical substitution or proof steps (+1 Mark)
• Step 3: Correct final value or conclusion with mandatory SI units (+1 Mark)