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Physics

Grade-9

Easy

Question

Identify the equation which happens at anode

$Z n (s) \to Z n^{+ 2} (a q .) + 2 e^{-}$
$C u^{+ 2} (a q .) + 2 e^{-} \to C u (s)$
$2 H^{+} (a q .) + 2 e^{-} \to H_{2} (g)$
None of the above

hint Hint:

An oxidation reaction that takes place in the anode.

The correct answer is: $Z n left parenthesis s right parenthesis space rightwards arrow Z n to the power of plus 2 end exponent left parenthesis a q. right parenthesis space plus 2 space e to the power of minus$

Oxidation reactions occur in the anode where the reduction reactions are carried out in the cathode.

Zn (s) → Zn⁺²(aq.) + 2 e^-is an oxidation reaction.

So this reaction Zn (s) → Zn⁺² (aq.) + 2e^- is occurs in the anode.

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