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QJEEM24Ch2e6b: JEE Main 2024 Chemistry - Class 12 JEEM24Ch2e6b Solution: The reaction at cathode in the cells commonly used in clocks…
The reaction at cathode in the cells commonly used in clocks involves.
Multiple Choice Options
- A oxidation of Mn from +2 to +7
- B reduction of Mn from +4 to +3
- C oxidation of Mn from +3 to +4
- D reduction of Mn from +7 to +2
Step-by-Step Verified Solution
In the cells commonly used in clocks, specifically alkaline batteries, the reaction at the cathode involves the reduction of manganese dioxide (MnO2). The manganese in MnO2 is initially in the +4 oxidation state, and it gets reduced to the +3 oxidation state. Thus, the correct reaction occurring at the cathode can be represented as follows:
The correct answer is:
Option B
reduction of