Chemistry-Oxidation Number
NEET Chemistry Oxidation Number MCQ Question
Type: MCQ-numerical-Hard-Class 11
In the reaction where Cr2O7^2- is converted to Cr3+, what is the total change in oxidation number for chromium atoms?
A
A decrease of 6
B
A decrease of 3
C
An increase of 6
D
An increase of 3
Correct Answer
Option A
Detailed Explanation
In Cr2O7^2-, each chromium has an oxidation number of +6, and in Cr3+, it is +3. The total change for two chromium atoms is 2 * (6 - 3) = 6.
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