The weights of metals of different valencies deposited at the cathode during electrolysis are in the ratio of
1 faraday of electricity always deposits 1 g.equivalent
When 6×1022 electrons are used in the electrolysis of a metallic salt, 1.9 gm of the metal is deposited at the cathode. The atomic weight of that metal is 57. So oxidation state of the metal in the salt is: