JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyApplication

JEE Main 27 July 2022, Shift 1, Chemistry Q65

Question 65 of 90 in this shift, Chemistry question 5 of 30, Section A.

Boiling point of a 2% aqueous solution of a non-volatile 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

(1) $\mathrm{M_A = 4M_B}$
(2) $\mathrm{M_B = 4M_A}$ Official answer
(3) $\mathrm{M_A = 8M_B}$
(4) $\mathrm{M_B = 8M_A}$

Official answer

Option 2

NTA final key.

Chapter: Solutions
Topic: Colligative Properties
Idea tested: Boiling Point Elevation

Same idea in other shifts

Asked 13× in all

4 Apr 2026, Shift 1 · Q75A non-volatile, non-electrolyte solid solute when dissolved in $40$ g of a solvent, the vapour pressure of the solvent decreased from…MediumNumerical value
8 Apr 2026, Shift 2 · Q54Which of the following statements are not correct ? A. For water, magnitude of $\mathrm{K_b}$ is more than the magnitude of…MediumOtherHas a figure
2 Apr 2025, Shift 2 · Q73When 1 g each of compounds AB and $\mathrm{AB_2}$ are dissolved in 15 g of water separately, they increased the boiling point of water by…MediumNumerical value
3 Apr 2025, Shift 1 · Q542 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is: (Given :…EasySingle correct
4 Apr 2024, Shift 1 · Q842.5 g of a non-volatile, non-electrolyte is dissolved in 100 g of water at 25°C. The solution showed a boiling point elevation by 2°C.…MediumNumerical value
13 Apr 2023, Shift 2 · Q84Sea water contains 29.25% NaCl and 19% $\mathrm{MgCl_2}$ by weight of solution. The normal boiling point of the sea water is ______…MediumNumerical value
26 Jul 2022, Shift 2 · Q84The 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…EasyNumerical value
27 Jun 2022, Shift 1 · Q832 g of a non-volatile non-electrolyte solute is disolved in 200 g of two different solvents A and B whose ebullioscopic constants are in…EasyNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.