JEE Main 2023 — Solutions Question with Solution

(A) Elevation in boiling point ($∆{\mathrm{T}}_{\mathrm{b}}$) temperature of the water is not same, as ‘$\mathrm{i}$’ value is different for two solutions.
(B) Azeotropic mixture: Liquid mixtures that distill over without changes in composition are called constant boiling mixtures or Azeotropes or Azeotropic mixtures.
(C) Osmosis always takes place from hypotonic (low concentration of solute) solution to hypertonic (high concentration of solute) solution.
(D) Let the mass of ${\mathrm{H}}_2{\mathrm{SO}}_4$ ($32\%$) is 100.

$\therefore$ Weight of ${\mathrm{H}}_2{\mathrm{SO}}_4$ = $32$

Moles of ${\mathrm{H}}_2{\mathrm{SO}}_4 = \frac{32}{98}$

Now, $4.09 = \frac{32}{98 \times \mathrm{V}}$

$\Rightarrow \mathrm{V} = 79 \mathrm{mL}$

Density = $\frac{100}{79} = 1.265$
(E) A negative charged sol is obtained when $\mathrm{KI}$ solution is added to silver nitrate solution whereas positive charged sol is obtained when ${\mathrm{AgNO}}_3$ solution is added to $\mathrm{KI}$ solution.

So, the correct answer is B and D only.