QJEEM23Ch2a33: JEE Main 2023 Chemistry - Class 12 JEEM23Ch2a33 Solution: Lead storage battery contains by weight solution of . The van't …

Question

Verified Solution • 2025–26 Session moderate

Lead storage battery contains

38 \%

by weight solution of

\mathrm{H}_{2} \mathrm{SO}_{4}

. The van't Hoff factor is

2.67

at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is ________. (Nearest integer).

Given

\mathrm{K}_{f}=1.8 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}

Accepted Answer

$\mathrm{\Delta T_f=K_f~i~m}$

$= 1.8 \times 2.67 \times {{{{38} \over {98}}} \over {0.062}} = 30$

$\therefore$ It freeze at $273-30=243$ $\mathrm{K}$

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