Chemistry · Electrochemistry

JEE Main 2024 — 5 April, Shift 1 — Question 66

The reaction at cathode in the cells commonly used in clocks involves.

Option A:
reduction of Mn from +4 to +3
Correct
Option B:
oxidation of Mn from +3 to +4
Option C:
reduction of Mn from +7 to +2
Option D:
oxidation of Mn from +2 to +7

Answer: A

Step-by-step solution

In the cathode reaction manganese $(\mathrm{Mn})$ is reduced from the +4 oxidation state to the +3 state.

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 5 April, Shift 1
Subject: Chemistry
Chapter: Electrochemistry
Topic: Batteries and Corrosion

Molar ionic conductivities of divalent cation and anion are 57 S cm^2 mol^-1 and 73 S cm^2 mol^-1 respectively. The molar conductivity of…

The reaction at cathode in the cells commonly used in clocks involves. | JEE Main 2024 PYQ with Solution · DhiX AI