Question

Which of the following statement is correct?
if $E_{C{u}^{2+}|Cu}^{\circ }=0.34V$ and $E_{S{n}^{2+}|Sn}^{\circ }=-0.136V$, $E_{H^{+}|H_2}^{\circ }=-0.0V$

• A. $C{u}^{2+}$ ions can be reduced by $H_2\left(g\right)$
• B. $Cu$ can be oxidized by $H^{+}$
• C. $S{n}^{2+}$ ions can be reduced by $H_2$
• D. $Sn$ can be oxidized by $C{u}^{2+}$

Answer 1

Answer: (A), (D)

The correct options are
A $C{u}^{2+}$ ions can be reduced by $H_2\left(g\right)$
D $Sn$ can be oxidized by $C{u}^{2+}$

As emf of cell is positive for both so these reactions are possible.
$E_1=0.34-0=0.34$
and
$E_2=0.34-(-0.136)=0.476$