Chemistry-Oxidation Number

NEET Chemistry Oxidation Number MCQ Question

Type: MCQ-diagram based-Hard-Class 11

In a redox reaction involving Cr2O7^2- and SO3^2-, which element undergoes a decrease in oxidation number, and by how many units does this change occur?

Question diagram
A

Chromium, decrease by 3 units

B

Sulfur, decrease by 2 units

C

Chromium, decrease by 2 units

D

Sulfur, decrease by 3 units

Correct Answer

Option A

Detailed Explanation

In the redox reaction, the oxidation state of chromium in Cr2O7^2- changes from +6 to +3, indicating a decrease of 3 units.

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