JEE Main 2022ChemistrySolutionsEasyNumerical

JEE Main 2022 — Solutions Question with Solution

JEE Main 2022 (26 Jul Shift 2)

Question

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 Kb and Kf i.e., Kb/Kf is 1:X. The value of X is

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Correct answer
1

Step-by-step explanation

We know that

ΔTb=iKbm1ΔTf=iKfm2

And for non-volatile solute i=1.

ΔTbΔTf=Kb×1 Kf×2⇒36=12=KbKf×12

KbKf=11⇒X=1

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About this question

This is a previous-year question from JEE Main 2022, covering the Solutions chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.