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The standard ...

Question

The standard electrode potentials of $Z n^{2 +} | Z n$ and $A g^{+}$ | Ag are -0.763 V and +0.799 V respectively. The standard potential of the cell is

A

1.56 V

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B

0.036 V

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C

-1.562 V

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D

0.799 V

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Solution

The correct option is B 1.56 V
$E_{c e l l}^{o} = E_{c a t h o d e}^{o} - E_{a n o d e}^{o} = E_{A g^{+} | A g}^{o} - E_{Z n^{2 +} | Z n}^{o} = 0.799 - (- 0.763) = 1.562 V$

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