Chemistry-Oxidation Number
NEET Chemistry Oxidation Number MCQ Question
Type: MCQ-numerical-Hard-Class 11
In the reaction Cr2O7 2– (aq) + SO3 2– (aq) → Cr3+ (aq) + SO4 2– (aq), what is the change in oxidation number for the chromium atoms?
A
Decrease by 6
B
Decrease by 3
C
Increase by 6
D
Increase by 3
Correct Answer
Option B
Detailed Explanation
The oxidation state of chromium changes from +6 in Cr2O7 2– to +3 in Cr3+, indicating a decrease of 3 units per chromium atom.
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