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Saturday, 31 October

JEE Main 2026 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 5 April 2026, Shift 2, Chemistry Q72

Question 72 of 75 in this shift, Chemistry question 22 of 25, Section B.

RMgI when treated with ice cold water liberated a gas which occupied 1.4 dm3^3/g at STP. The gas produced is further reacted with iodine in presence of HIO3\mathrm{HIO_3} to give compound (X). Compound (X) in presence of Na and dry ether produced compound (Y). Molar mass of compound (Y) is __________ g mol−1^{-1}. (Nearest integer)

Official answer

30

NTA final key.

Chapter
Haloalkanes and Haloarenes
Topic
Alkanes and Free Radicals
Idea tested
Hydrolysis of Grignard Reagents

Same idea in other shifts

Asked 2× in all
  1. 29 Jul 2022, Shift 2 · Q74Compound ‘A’ undergoes following sequence of reactions to give compound ‘B’. The correct structure and chirality of compound ‘B’ is [where…MediumSingle correctHas a figure

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.