Question

during extraction of metal, electrolytic refining is used to obtain pure metals

Answer 1

a. a pure silver electrode can be used for a cathode. an impure silver electrode with impurities like gold and platinum and copper can be used for an anode.

b. any ionic silver salt can be used as an electrolyte like silver sulphide, silver nitrate etc.

c. we get pure silver deposited at the pure silver cathode