JEE Main 2023 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 11 April 2023, Shift 2, Chemistry Q81

Question 81 of 90 in this shift, Chemistry question 21 of 30, Section B.

The volume of hydrogen liberated at STP by treating 2.4 g of magnesium with excess of hydrochloric acid is __________

\times 10^{-2}

L Given : Molar volume of gas is 22.4 L at STP. Molar mass of magnesium is 24 g mol

^{-1}

Official answer

224

NTA final key.

Chapter: Some Basic Concepts of Chemistry
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
29 Jul 2022, Shift 2 · Q88A 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…MediumNumerical 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.