If 9 g H₂O is electrolysed completely with current efficiency of 50%, then-

The passage of electricity through certain electrolyte results in liberation of H₂ gas at the cathod

When copper sulphate solution is electrolysed in a copper voltameter for 30 s, m gram of copper was

A current of 2 A when passed for 5 h through a molten salt deposits 22.2 g of metal of atomic mass 1

In electroplating, m g of silver is deposited when 4 A current flows for 2 min. The amount of silver

Salts of A (atomic mass 15), B (atomic mass 27) and C (atomic mass 48) were electrolysed using same