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Answer:
1) One should not touch electrical appliances with wet hands. Since water is a good conductor, contact with moisture may result in electric shocks.
2) The electric wires are made of metals like copper and aluminium because they are conductors but the outer covering of electric wires is made of plastic (or rubber) because it is an insulator.
3) Electroplating is a general name for processes that create a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current.
4)During copper plating of an iron key, copper metal is transferred from the copper plate to the iron key through the copper sulphate solution. During electroplating with copper, copper metal gets transferred from positive electrode to the negative electrode.
5)Electroplating is widely used in industry and decorative arts to improve the surface qualities of objects—such as resistance to abrasion and corrosion, lubricity, reflectivity, electrical conductivity, or appearance.
6)The most common hot dipping process for industrial applications is galvanizing, which refers to the coating of zinc over iron or steels for rust proofing. It is an extremely versatile and easy means of providing corrosion protection for construction materials exposed to atmospheric conditions.