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Question

Standard electrode potential for Sn4+/Sn couple is +0.15 V and that for the Cr3+/Cr couple is –0.74 V. These two couples in their standard state are connected to make a cell. The cell potential will be:

A
+1.83 V
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B
+1.19 V
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C
+0.89 V
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D
+0.18 V
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Solution

The correct option is C +0.89 V
Ecell=EcathodeEanode=0.15(0.74)=+0.89V

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