MCQ
Consider the half reactions with standard potentialsi. $Ag _{( aq )}^{+}+ e ^{-} \longrightarrow Ag _{( s )} \quad E^0=0.8 V$
ii. $I _{2( s )}+2 e ^{-} \longrightarrow 2 l _{( aq )}^{-} \quad E^0=0.53 V$
iii. $Pb _{( aq )}^{2+}+2 e ^{-} \longrightarrow Pb _{( s )} E^0=-0.13 V$
iv. $Fe _{( aq )}^{2+}+2 e ^{-} \longrightarrow Fe _{( s )} E^0=-0.44 V$
The strongest oxidising and reducing agents respectively are
ii. $I _{2( s )}+2 e ^{-} \longrightarrow 2 l _{( aq )}^{-} \quad E^0=0.53 V$
iii. $Pb _{( aq )}^{2+}+2 e ^{-} \longrightarrow Pb _{( s )} E^0=-0.13 V$
iv. $Fe _{( aq )}^{2+}+2 e ^{-} \longrightarrow Fe _{( s )} E^0=-0.44 V$
The strongest oxidising and reducing agents respectively are
- AAg and $Fe ^{2+}$
- ✓$Ag ^{+}$and Fe
- C$Pb ^{2+}$ and $I ^{-}$
- D$I _2$ and $Fe ^{2+}$