Question

Which one is/ are correct among the following?
Given, the half cell emf's $E_{C{u}^{+2}/Cu}^0=0.337,E_{C{u}^{+1}/Cu}^0=0.521$.

• A. $C{u}^{+1}$ disproporationates
• B. $Cu$ and $C{u}^{2+}$ comproportionates (reverse of disproportionation into $C{u}^{+}$).
• C. $E_{Cu/C{u}^{+2}}^0+E_{C{u}^{+2}/Cu}^0$ is positive
• D. All of these

Answer 1

The correct option is D All of these

$\begin{array}{c}Cu|C{U}^{2+}\parallel C{u}^{+}|C_4\\ E_{cell}^{{}^{\circ }}=E_{Cathode}^{{}^{\circ }}-E_{anode}^{{}^{\circ }}\\ \Rightarrow 0.521-0.337\Rightarrow +vevalue.\end{array}$

So, Reaction is

$\begin{array}{cc}Cu\to C{u}^{2+}+2e^{-}\to \left(i\right)& \\ 2C{u}^{+}\to 2e^{-}\to 2Cu\to \left(ii\right)& \\ 2C{u}^{+}\to C{u}^{2+}+Cu& C{u}^{+}isdisproportinates.\\ Cu+C{u}^{2+}comproportionates& \end{array}$

Option D is correct. All of these.