Question

give reasons for the following
(a) cooking pans have plastic handles
(b) burning of plastic 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

The reasons for the following are given below -

• Cooking pans have plastic handles because plastic is a bad conductor of heat so it protects the hands from getting burned by the heat of the utensil/pans.
• Burning of plastic causes air pollution because, when plastic burns it releases certain toxic gases in the atmosphere like dioxins, furans, mercury and polychlorinated biphenyls which causes air pollution.
• Nylon is used for making climbing ropes because of the great strength of nylon thread which can withstand heavy loads.
• Refrigerators have a plastic foam core because plastic is a good insulator (or bad conductor) of heat. So, it does not allow heat to come inside the refrigerator.
• Electric wires have a plastic covering because plastic is poor conductor of electricity that is it does not allow current to pass through it. So, it prevents from electric shocks.
• Bakelite is used for making electric switches because it is a thermosetting plastic which means it is a poor conductor of both heat and electricity to protect us from getting electric currents.

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