JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 26 July 2022, Shift 1, Chemistry Q87

Question 87 of 90 in this shift, Chemistry question 27 of 30, Section B.

The amount of charge in F (Faraday) required to obtain one mole of iron from

\mathrm{Fe_3O_4}

is ____________. (Nearest Integer)

Official answer

NTA final key.

Chapter: Electrochemistry
Topic: Faraday's Laws of Electrolysis
Idea tested: Charge-Mole Relationship

Same idea in other shifts

Asked 4× in all

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26 Feb 2021, Shift 1 · Q56Consider the following reaction $\mathrm{MnO_4^- + 8H^+ + 5e^- \rightarrow Mn^{+2} + 4H_2O}$ , $\mathrm{E^\circ} = 1.51$ V. The quantity of…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.