Account for the following:
(i) Electrical wire are coated with plastic.
(ii) Carbon is not used for reducing aluminium from aliminium oxide.

Explanation

(i) Electrical wires are made of copper with a plastic coating. It the wires are made only copper, then they will give electric shock to the person who is touching them. Also, copper wire will corrode when it is exposed to moist air.
Hence these wires are coated wtih plastic, which is an insulator and hence prevents possibility of electric shock and also corrosion of copper.
(ii) Because aluminium has greater affinity for carbon, carbon can not be used as reducing agent to reduce alumina `(Al_(2)O_(3))` from aluminium.