Which of the following is a redox reaction?

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(D) redox reaction is one in which both oxidation and reduction occur simultaneously,involving a change in the oxidation states of the elements.In the

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$Zn + 2AgCN 	o 2Ag + Zn(CN)_2$

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(D) redox reaction is one in which both oxidation and reduction occur simultaneously,involving a change in the oxidation states of the elements.In the reaction $Zn + 2AgCN 	o 2Ag + Zn(CN)_2$:$1$. The oxidation state of $Zn$ changes from $0$ to $+2$ (oxidation).$2$. The oxidation state of $Ag$ changes from $+1$ to $0$ (reduction).Since both oxidation and reduction occur,this is a redox reaction.The other options represent double displacement or acid-base reactions where no change in oxidation states occurs.

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