JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 29 July 2022, Shift 2, Chemistry Q88

Question 88 of 90 in this shift, Chemistry question 28 of 30, Section B.

A 1.84 mg sample of polyhydric alcoholic compound ‘X’ of molar mass 92.0 g/mol gave 1.344 mL of

\mathrm{H_2}

gas at STP. The number of alcoholic hydrogens present in compound ‘X’ is ______.

Official answer

NTA final key.

Chapter: Alcohols, Phenols and Ethers
Topic: Stoichiometry
Idea tested: Mass-Volume Stoichiometry at STP

Same idea in other shifts

Asked 3× in all

3 Apr 2025, Shift 2 · Q51Mass of magnesium required to produce 220 mL of hydrogen gas at STP on reaction with excess of dil. HCl is Given: Molar mass of Mg is…EasySingle correct
11 Apr 2023, Shift 2 · Q81The volume of hydrogen liberated at STP by treating 2.4 g of magnesium with excess of hydrochloric acid is __________ $\times 10^{-2}$ L…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.