JEE Main 2022ChemistrySolutionsHardMCQ

JEE Main 2022 — Solutions Question with Solution

JEE Main 2022 (27 Jul Shift 1)

Question

Boiling point of a 2% aqueous solution of a nonvolatile solute A is equal to the boiling point of 8% aqueous solution of a non-volatile solute B. The relation between molecular weights of A and B is.

Choose an option

Show full solutionCorrect option: B
Correct answer
BMB=4MA

Step-by-step explanation

For A : 100gm solution →2gm solute A ∴ Molality =2/MA0.098

For B : 100gm solution →8gm solute B ∴ Molality =8/MB0.092

∵ ΔTBA=ΔTBB

∴ Molality of A= Molality of B

∴20.098MA=80.092MB

298×928=MAMB

14.261=MAMB

∴ MB=4.261×MA

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Solutions chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

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.