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Introduction

Standard elec...

Question

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

+1.83 V

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+1.19 V

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+0.89 V

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+0.18 V

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Solution

The correct option is C +0.89 V
$E_{c e l l} = E_{c a t h o d e} - E_{a n o d e} = 0.15 - (- 0.74) = + 0.89 V$

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