The oxidation potentials of Zn, Cu, Ag, `H_(2)` and Ni are 0.76, -0.34, 0.80, 0 and 0.25 volt respectively. Which of the following reactions will provide maximum voltage ?A. `Zn+Cu^(2+) rarr Cu + Zn^(2+)`B. `Zn+2Ag^(+) rarr 2Ag+zn^(2+)`C. `H_(2) + Cu^(2+) rarr 2H^(+) + Cu`D. `H_(2)+Ni^(2+) rarr 2H^(+) + Ni`

The oxidation potentials of Zn, Cu, Ag, `H_(2)` and Ni are 0.76, -0.34

1.	The oxidation potentials of Zn, Cu, Ag, `H_(2)` and Ni are 0.76, -0.34, 0.80, 0 and 0.25 volt respectively. Which of the following reactions will provide maximum voltage ?A. `Zn+Cu^(2+) rarr Cu + Zn^(2+)`B. `Zn+2Ag^(+) rarr 2Ag+zn^(2+)`C. `H_(2) + Cu^(2+) rarr 2H^(+) + Cu`D. `H_(2)+Ni^(2+) rarr 2H^(+) + Ni`
Answer» Correct Answer - B

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What are elementary reactions ?

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