For the redox reactionCr2O72- + H+ + Ni → Cr3+ + Ni2+ + H2OThe correct coefficients of the reactants for the balanced reaction are

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Cr2O72- Ni H+ 1 3 14

Cr2O72- Ni H+ 2 3 14

Cr2O72- Ni H+ 1 1 16

Cr2O72- Ni H+ 3 3 12

answer is A.

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Detailed Solution

The balanced equation isCr2O72- + 14H+ + 3Ni → 2Cr3+ + 3Ni2+ + 7H2O