Chemistry-Oxidation Number
NEET Chemistry Oxidation Number MCQ Question
Type: MCQ-numerical-Medium-Class 11
What is the change in oxidation number for chromium when Cr2O7 2– is reduced to Cr3+ ions in acidic medium?
A
3 units
B
6 units
C
2 units
D
5 units
Correct Answer
Option A
Detailed Explanation
In the NCERT context, the oxidation state of chromium in Cr2O7 2– changes from +6 to +3, indicating a decrease in oxidation number by 3 units per chromium atom.
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