When Hydrogen is obtained through electrolysis of acid diluted water then hydrogen gas evolves at ___ charged electrode.
H+ ion being positively charged moves towards the negatively charged electrode (cathode).
At cathode,
H+ + e− ⟶H
H+H⟶H2
On electrolysis of dilute copper(II) sulphate solution, copper is deposited at the cathode but hydrogen gas evolves there.
Hydrogen gas is evolved when copper turnings are added to dilute sulphuric acid.
Why generally Hydrogen gas is not evolved when metals react with dilute Nitric acid?