NEET Chemistry Oxidation Number MCQ Question
In the ion-electron method for balancing the redox reaction Cr2O7^2- (aq) + SO3^2- (aq) → Cr3+ (aq) + SO4^2- (aq), what is the change in oxidation number for chromium?
Decrease from +6 to +3
Increase from +3 to +6
Decrease from +3 to +0
Increase from +0 to +3
Correct Answer
Detailed Explanation
In the given reaction, the oxidation state of chromium changes from +6 in Cr2O7^2- to +3 in Cr3+, indicating a decrease of 3 units.
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