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Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 25 June 2022, Shift 2, Chemistry Q85

Question 85 of 90 in this shift, Chemistry question 25 of 30, Section B.

A solution of Fe2(SO4)3\mathrm{Fe_2(SO_4)_3} is electrolyzed for ‘x’ min with a current of 1.5 A to deposit 0.3482 g of Fe. The value of x is ________. [nearest integer] Given : 1 F = 96500 C mol−1\mathrm{C\ mol^{-1}} Atomic mass of Fe = 56 g mol−1\mathrm{g\ mol^{-1}}

Official answer

20

NTA final key.

Chapter
Electrochemistry
Topic
Faraday's Laws of Electrolysis
Idea tested
Faraday's First Law

Same idea in other shifts

Asked 2× in all
  1. 29 Jan 2024, Shift 1 · Q86The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0.015 A for 15 minutes is ________…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.