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The oxidation state of chromium in the final product formed by the reaction between KI and acidified potassium dichromate solution is:

1. +3
2. +2
3. +6
4. +4

Correct answer: +3

Solution

In the reaction between KI and acidified potassium dichromate, chromium is reduced from its +6 oxidation state in dichromate to +3 in the final product, which is a common outcome in redox reactions involving dichromate ions.

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