Learn

Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 6 September 2020, Shift 2, Chemistry Q34

Question 34 of 75 in this shift, Chemistry question 9 of 25.

Dihydrogen of high purity (>99.95%>99.95\%) is obtained through :
  1. (1)the electrolysis of acidified water using Pt electrodes.
  2. (2)the electrolysis of brine solution.
  3. (3)the reaction of Zn with dilute HCl.
  4. (4)the electrolysis of warm Ba(OH)2\mathrm{Ba(OH)_2} solution using Ni electrodes.Official answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter
Hydrogen

Same idea in other shifts

Asked 2× in all
  1. 25 Jul 2022, Shift 2 · Q68High purity (>99.95%) dihydrogen is obtained byEasySingle 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.