Chemistry-Oxidation Number
NEET Chemistry Oxidation Number MCQ Question
Type: MCQ-diagram based-Medium-Class 11
A diagram illustrates the reaction between MnO₄⁻ (aq) and I⁻ (aq) in basic medium, forming MnO₂ (s) and I₂ (s). Which element undergoes a change in oxidation number, and what is the change?
A
Manganese; it decreases from +7 to +4.
B
Iodine; it increases from -1 to 0.
C
Manganese; it increases from +4 to +7.
D
Iodine; it decreases from 0 to -1.
Correct Answer
Option A
Detailed Explanation
In the reaction given, MnO₄⁻ is reduced to MnO₂, indicating manganese's oxidation number decreases from +7 to +4. This is a redox change where manganese is reduced.
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