JEE Main 2021 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 18 March 2021, Shift 1, Chemistry Q54

Question 54 of 90 in this shift, Chemistry question 24 of 30, Section B.

2 molal solution of a weak acid HA has a freezing point of 3.885°C. The degree of dissociation of this acid is __________

\times10^{-3}

. (Round off to the Nearest Integer). [Given : Molal depression constant of water = 1.85 K kg mol

^{-1}

Freezing point of pure water = 0°C]

Official answer

NTA final key.

Chapter: Solutions
Topic: Colligative Properties
Idea tested: Freezing Point Depression

Same idea in other shifts

Asked 5× 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 42 of the 174 JEE Main shifts held from 2017 to 2026.