JEE Main 2022 · 26 Jul · Shift 2 · Chemistry Q84

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ChemistryInteger+4 / -1Question 84 of 90

The elevation in boiling point for 1 molal solution of non-volatile solute A is 3 K. The depression in freezing point for 2 molal solution of A in the same solvent is 6 K. The ratio of $K_b$ and $K_f$ i.e., $K_b/K_f$ is 1 : X. The value of X is [nearest integer]

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Answer and worked solution

Official answer: 1

Constants. $K_b=\frac31=3$ K kg mol $^{-1}$ and $K_f=\frac62=3$ K kg mol $^{-1}$ , so the ratio is 1 : 1.

Answer: 1

Topics:Colligative properties

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JEE Main 2022 · 26 Jul · Shift 2, Chemistry question 84