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Given below are the half-cell reactions : Mn 2+ + 2e – → Mn; Eº = –1.18 V 2(Mn 3+ + e – → Mn 2+ ); Eº = +1.51 V The Eº for 3Mn 2+ → Mn + 2Mn 3+ will be :

1. – 2.69 V; the reaction will occur
2. – 0.33 V; the reaction will not occur
3. – 0.33 V; the reaction will occur
4. – 2.69 V; the reaction will not occur

Correct answer: – 2.69 V; the reaction will not occur

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