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Select an example of redox reaction.

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None of the above

$Mg \to {Mg}^{2 +} + 2 e^{-}$

${Zn}^{2 +} + 2 e^{-} \to Zn$

$Mg + {ZnSO}_{4} \to {MgSO}_{4} + Zn$

answer is A.

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Detailed Solution

Explanation:

This is a redox reaction where Magnesium (Mg) is oxidized and Zinc (Zn) is reduced. Here's how it works:

Oxidation (Loss of Electrons):

Magnesium (Mg) loses two electrons to form Mg²⁺.

Mg → Mg²⁺ + 2e⁻

Reduction (Gain of Electrons):

Zinc ions (Zn²⁺) gain two electrons to form solid Zinc (Zn).

Zn²⁺ + 2e⁻ → Zn

This complete reaction involves both oxidation and reduction, making it a redox reaction.

Final Answer

Mg + ZnSO₄ → MgSO₄ + Zn

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