Give reason why:
(a) Copper metal is used for making electric wires.
(b) Graphite is used for making the electrode in a dry cell.
The pencil leads are made of mainly : (a) lithium (b) charcoal (c) lead (d) graphite
(a) State observation at the anode when aqueous copper sulphate solution is electrolysed using copper electrodes.
(b) During electrolysis of molten lead bromide, graphite anode is preferred to other electrodes. Give reason.
(c) Electrolysis of molten lead bromide is considered to be a redox reaction. Give reason.