p -Block elements - ll — Chemistry STD 12 Science — Question

$C{{H}_{3}}COOEt+{{H}_{2}}O\xrightarrow{{{H}^{+}}}C{{H}_{3}}COOH+EtOH$

$A^+/A = \,-\,2.93\, Volt$,        $B^+/B = 0.80\,V$

$C^{+2}/C = \,-\,2.37\, Volt$,     $D^{+3}/D = \,-\,0.74\,V$

Increasing order of reducing power of these metals

$Sn ^{2+}+2 e ^{-} \rightarrow Sn$

$Sn ^{4+}+4 e ^{-} \rightarrow Sn$

The electrode potentials are; $E _{ Sn ^{2+} / Sn }^{\circ}=-0.140\, V$ and $E _{ Sn ^{4+} / Sn }^{\circ}=0.010\, V$. The magnitude of standard electrode potential for $Sn ^{4+} / Sn ^{2+}$ i.e. $E _{ Sn ^{4+} / Sn ^{2+}}^{\circ}$ is $.....\times 10^{-2}\, V$. (Nearest integer)

$A\, + \,{O_2}\, \to \,B\,\,\,;\,\,\,B\, + \,{H_2}O\, \to \,C\, + \,A$

$A\,\,B$ and $C$ respectively are