1.The conduction of electricity through the electrolyte solution is due to

2.The chemical reaction taking place at anode is

3.Certain quantity of current librated 0.504 g of hydrogen in 2 hr. The number of grams of copper that can be librated by same current under similar conditions will be approximately

4.A certain quantity of current i amp was passed through three electrolytic cells P, Q, R connected in series and containing aqueous solutions of silver nitrate, mercuric nitrate and mer-curous nitrate respectively. It resulted in the deposition of0.216 g of Ag. The masses of Hg deposited in cell Q andR respectively (At. = 108; Hg = 200.6)

5.During the electrolysis of water 4 mol of electrons were transferred from anode to cathode. The total volume of the gases produced at STP will be approximately