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Saturday, 31 October

JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 5 April 2024, Shift 1, Chemistry Q64

Question 64 of 90 in this shift, Chemistry question 4 of 30, Section A.

The reaction at cathode in the cells commonly used in clocks involves.
  1. (1)reduction of Mn from +7+7 to +2+2
  2. (2)reduction of Mn from +4+4 to +3+3Official answer
  3. (3)oxidation of Mn from +3+3 to +4+4
  4. (4)oxidation of Mn from +2+2 to +7+7

Official answer

Option 2

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Topic
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Idea tested
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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.