Which of the following does not evolve oxygen at anode when the electrolysis is carried out of

Options

A. Dilute `H_(2)SO_(4)` with `Pt` electrode
B. Fused sodium hydroxide with `Pt` electrodes
C. Acidic water with `Pt` electrodes
D. Dilute sulphuric acid using `Cu` electrodes

Answer

d

Explanation

`E^(c-)._(o x)` of `Cu=-0.34`
Using coper electrodes, copper will oxidize `:`
`Cu rarr Cu^(2+)+2e^(-)`
So oxygen is not evolved.