JEE Main 2021 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 17 March 2021, Shift 1, Chemistry Q51

Question 51 of 90 in this shift, Chemistry question 21 of 30, Section B.

The mole fraction of a solute in a 100 molal aqueous solution is __________

\times 10^{-2}

. (Round off to the Nearest Integer). [Given : Atomic masses : H : 1.0 u, O : 16.0 u]

Official answer

NTA final key.

Chapter: Solutions
Topic: Mole Concept
Idea tested: Molality Calculation

Same idea in other shifts

Asked 3× 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.