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The standard reduction potentials of Ag,...

The standard reduction potentials of Ag, Cu, Co and Zn are 0.799, 0.337,-0.277 and 0.762V respectively. Which of the following cells will have maximum cell e.m.f.?

A

`Zn//Zn^(2+)(1M) //Cu^(2+) (1M) //Cu`

B

`Zn//Zn^(2+) (1M)//Ag^(+) (1M)//Ag`

C

`Cu//Cu^(2+) (1M) //Ag^(+) (1M) // Ag`

D

`Zn//Zn^(2+) (1M) // Co^(2+) (1M)//Co`

Text Solution

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The correct Answer is:
B
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