Q.

The standard oxidation potential E0 for the half cell reaction areFe→Fe2++2e−;    E∘=+0.41VCu→Cu2++2e−;    E∘=−0.34VEMF of the cell reaction isFe(s)+Cu2+(aq)→Fe2+(aq)+Cu(s)

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a

0.75 V

b

-0.75 V

c

0.07 V

d

- 0.07 V

answer is A.

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Detailed Solution

Ecell =Ecathode0 −Eanode0 = 0.34 – (– 0.41)= 0.75 V
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The standard oxidation potential E0 for the half cell reaction areFe→Fe2++2e−;    E∘=+0.41VCu→Cu2++2e−;    E∘=−0.34VEMF of the cell reaction isFe(s)+Cu2+(aq)→Fe2+(aq)+Cu(s)