First slide

Electrolysis

Question

Which of the following aqueous solution produces metal after electrolysis ?

Easy

A

K₂Cr₂O₇
B

KMnO₄
C

CH₃COONa
D

CuCl₂

Solution

$\begin{array}{l} ∵ E_{K^{+} ∣ K}^{\circ} < E_{H_{2} O / H_{2}}^{\circ}; E_{{Na}^{+} ∣ Na}^{\circ} < E_{H_{2} O / H_{2}}^{\circ} \\ E_{{Cu}^{2 +} ∣ Cu}^{\circ} > E_{H_{2} O ∣ H_{2}}^{\circ} \end{array}$

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