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SEP for $S n^{4 +} / S n^{+ 2}$ couple is +0.15V and that for $C r^{3 +} / C r$ couple is -0.74V. These two couples in their standard state are connected to make a cell. The cell potential will be

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+1.19V

+0.18V

+0.89V

+1.83V

answer is C.

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Detailed Solution

$E_{c e l l}^{0} = E_{c a t h o d e}^{0} - E_{a n o d e}^{0} = 0.15 - (- 0.74) = + 0.89 V$

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