The standard reduction potential for Fe2+/Fe and Sn2+/Sn electrodes are -0.44 and -0.14 volt respectively. For the given cell reaction Fe2++Sn→Fe+Sn2+, the standard EMF is
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a
+0.30 V
b
-0.58 V
c
+0.58 V
d
-0.30 V
answer is D.
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Detailed Solution
From the given Cell reaction Sn is acting as cathode and Fe is acting as anode Ecell=Ec-Ea=-0.44-(-0.14)=-0.3V