Question

give reasons for the following (a) cooking pans have handles (b) burning of plastices cause air pollutions (c) nylon is used for making climbing ropes (d) refrigerator have a plastic foam core (e) electric wires have a plastic covering (f) bakelite is used for making electric switches

Answer 1

(A) cooking pans have handles as metal conduct heat but plastics not they are insulators
(B) burning of plastics cause air pollution as they are made up of harmful chemicals
(C) nylon is used for making climbing ropes as they are made by chemicals and are considered as the strongest fiber
(E) electric wires have plastic coating as plastic is not a conductor of electricity

Answer 2

(d) Plastic foam core in the refrigerator does not absorb heat from the surroundings and is a bad insulator of electricity

(f) Bakelite is a good electrical insulator and is also a shock resistant