Which of the following reactions does not inv | vedclass

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(C) In a redox reaction,the oxidation state of at least one element must change. In the reaction $CrO_4^{2-} 	o Cr_2O_7^{2-}$,the oxidation state of

Vedclass · Accepted Answer

$CrO_4^{2-} 	o Cr_2O_7^{2-}$

Vedclass · Answer

(C) In a redox reaction,the oxidation state of at least one element must change. In the reaction $CrO_4^{2-} 	o Cr_2O_7^{2-}$,the oxidation state of $Cr$ in $CrO_4^{2-}$ is $+6$ $(x + 4(-2) = -2 \implies x = +6)$. In $Cr_2O_7^{2-}$,the oxidation state of $Cr$ is also $+6$ $(2x + 7(-2) = -2 \implies 2x = 12 \implies x = +6)$. Since there is no change in the oxidation state of any element,this reaction is not a redox reaction.

Which of the following reactions does not involve either oxidation or reduction?

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