The standard electrode potentials E M + / M o of four metals A,   B,   C and D are − 1 .2   V, 0 .6   V , 0 .85   V and − 0 .76   V , respectively. The sequence of deposition of metals on applying potential is

Step-by-step solution

In complete cation electrolysis at cathode, the species having higher reduction potential is preferably reduced at cathode E C ∘ > E B ∘ > E D ∘ > E A ∘ Hence, C   >   B   >   D   >   A will be the preference of deposition of these metals on competing.