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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 25 July 2022, Shift 2, Chemistry Q68

Question 68 of 90 in this shift, Chemistry question 8 of 30, Section A.

High purity (>99.95%) dihydrogen is obtained by
  1. (1)reaction of zinc with aqueous alkali.
  2. (2)electrolysis of acidified water using platinum electrodes.
  3. (3)electrolysis of warm aqueous barium hydroxide solution between nickel electrodes.Official answer
  4. (4)reaction of zinc with dilute acid.

Official answer

Option 3

NTA final key.

Chapter
Hydrogen
Topic
Hydrogen and Hydrides
Idea tested
High Purity Dihydrogen Preparation

Same idea in other shifts

Asked 2× in all
  1. 6 Sep 2020, Shift 2 · Q34Dihydrogen of high purity (>99.95%>99.95\%) is obtained through :EasySingle correct

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.