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1. Give Reason 1) Cooking pans have plastics handles. 2) refrigerator have a plastic foam core. 3) burning of plastics causes air pollution. 4) Bakelite is used for making electrical switches . 5) electric wires have a plastic covering. 2. write any 5 environmental hazards of disposal of plastics.

 1. Answers:

1) Cooking pans have plastics handles.
            A metal handle would get almost as hot as the pot, while cooking something for an extended time. Wood and plastic does not conduct heat as well as metal, so a wooden or plastic handle is used in cookwares.
2) Refrigerator have a plastic foam core.
          It is used because plastics are good insulators and they can resist the low temperature easily , as well as balance the temperature of the surrounding with the temperature of the refrigerator.
3) Burning of plastics causes air pollution.
         It generates large amount of carbon-di-oxide and other hazardous gases which causes health and environment problems. In air it contributes reduction in quality of air by adding unwanted CO2 ,CO gases.
4) Bakelite is used for making electrical switches.
        Bakelite is used in making electrical appliances because it has very good electrical insulating properties.
5) Electric wires have a plastic covering.       
         Electrical wires are coated in plastic to prevent conduction of electricity to people or other metallic and conductive materials. Plastic is also flexible and will bend around tight corners and through narrow spaces.


2. write any 5 environmental hazards of disposal of plastics.
 i) Polyethylene, contained in plastic articles including shopping bags, disposable bottles and glasses, chewing gum and toys, is believed to be carcinogenic (cancer causing). 
ii) plastic water bottles contain Bisphenol A, a compound that is believed to cause cancer, impair the immune system lead to early puberty and trigger development of obesity and diabetes.
iii) Polystyrene, the form of plastic used to make articles such as disposable cups and plates, it is believed, enters the body with food and accumulates in fat tissues. It can also cause irritation in the eyes, nose and throat.
iv) Polyvinyl chloride (PVC), a form of plastic used in packaging, containers, utility items and cosmetics has been linked to onset of cancer and birth and genetic conditions. It can also cause bronchitis, skin disease, deafness and vision problems, and digestion and liver related problems.
v) Tetrafluoro-ethelyne, the plastic compound used to manufacture non-stick cooking ware, can irritate the eyes and nose and cause respiratory problems.


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