Dichromate ion is treated with base, the oxidation number of Cr in the product formed is ___________.
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Correct Answer: 6
Solution and Explanation
Oxidation number of Cr in \(\mathrm{CrO_4^{2-}}\): \(x + 4(-2) = -2 \Rightarrow x = +6\).
This is not a redox reaction, so Cr stays +6.
Answer: 6
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