Liquid Solution · Chemistry · WB JEE

MCQ (Single Correct Answer)

$P$ and $Q$ combines to form two compounds $\mathrm{PQ}_2$ and $\mathrm{PQ}_3$. If $1 \mathrm{~g} ~\mathrm{PQ}{ }_2$ is dissolved in 51 g benzene the depression of freezing point becomes $0 \cdot 8^{\circ} \mathrm{C}$. On the other hand if $1 \mathrm{~g} ~\mathrm{PQ}_3$ is dissolved in 51 g of benzene, the depression of freezing point becomes $0.625^{\circ} \mathrm{C}$. The atomic mass of P and Q are $\left(\mathrm{K}_{\mathrm{f}}\right.$ of benzene $=5 \cdot 1 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1})$

WB JEE 2025

The correct order of boiling point of the given aqueous solutions is

WB JEE 2024

A solution containing 4g of polymer in 4.0 litre solution at 27$$^\circ$$C shows an osmotic pressure of 3.0 $$\times$$ 10$$^{-4}$$ atm. The molar mass of the polymer in g/mol is

WB JEE 2023

Pick the correct statement.

WB JEE 2022

When 20 g of naphthoic acid (C₁₁H₈O₂) is dissolved in 50 g of benzene, a freezing point depression of 2K is observed. The van't Hoff factor (i) is [K_f = 1.72 K kg mol^$$-$$1]

WB JEE 2021

Equal masses of ethane and hydrogen are mixed in an empty container at 298 K. The fraction of total pressure exerted by hydrogen is

WB JEE 2020

K_f (water) = 1.86 K kg mol^-1. The temperature at which ice begins to separate from a mixture of 10 mass % ethylene glycol is

WB JEE 2020

Equal weights of ethane and hydrogen are mixed in an empty container at 25$$^\circ$$C. The fraction of total pressure exerted by hydrogen is

WB JEE 2018

Assuming the compounds to be completely dissociated in aqueous solution, identify the pair of the solutions that can be expected to be isotonic at the same temperature.