JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 12 April 2023, Shift 1, Chemistry Q84

Question 84 of 90 in this shift, Chemistry question 24 of 30, Section B.

80 mole percent of

\mathrm{MgCl_2}

is dissociated in aqueous solution. The vapour pressure of 1.0 molal aqueous solution of

\mathrm{MgCl_2}

at 38°C is ________ mm Hg. (Nearest integer) Given : Vapour pressure of water at 38°C is 50 mm Hg

Official answer

NTA final key.

Chapter: Solutions
Topic: Colligative Properties
Idea tested: Van't Hoff Factor (i)

Same idea in other shifts

Asked 7× in all

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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.