Question

We come to a conclusion that plastics are bad conductors of electricity from the following.
This question has multiple correct options,
A.Refrigerators and freezers have a plastic foam core
B.Electrical wires have a plastic covering
C.Cooking pans have plastic handles
D.We use to prepare parachutes

Answer 1

Hint: We know that plastic is a synthetic material that is made from a wide variety of organic polymers like polyethylene, nylon, PVC, etc., which could be molded to shape while soft, and could be set to a rigid or slightly elastic form.
Let us remember that all plastics are said to be polymers but not all polymers come under plastic.

Complete step by step answer:We can say any synthetic or semi-synthetic organic polymer is known as plastic. While plastics may be prepared for any organic polymer, most plastic that is used in industries is made from petrochemicals.
Plastic polymers contain chains of linked subunits known as monomers.
We can classify the two types of plastic as thermoplastics and thermosetting polymers.
Thermosetting polymers are those materials that solidify to a permanent shape. They are amorphous in nature and are said to have infinite molecular weight.
Thermoplastics polymers could be heated and remolded over again. Certain thermoplastics are amorphous in nature, while some have crystalline structure partially. They have a molecular weight between 20,000 to 500,000 amu.
We can discuss some properties of solids as,
Plastics are solids. They may be amorphous, crystalline, or semi-crystalline solids.
They do not conduct heat and electricity. Several polymers are insulators that have high dielectric strength.
Plastics are durable, and their degradation rate is slow.
Glassy polymers have a tendency to be stiff such as polystyrene. Thin sheets of these polymers could be used as films such as polyethylene.
Commonly used household electronics such as washing machines, freezers etc are manufactured from plastics because plastics are a bad conductor of electricity.
Option (A), (B) and (C) are correct.


Note:
We have to know that the polymer that is used to prepare plastic is always mixed with additives, including colorants, fillers, and reinforcements. These additives show an effect on the chemical composition, chemical properties, and mechanical properties of plastic.
Some of the examples of plastic materials include polystyrene (PS), acrylonitrile butadiene styrene (ABS), polyester (PES), polyethylene terephthalate (PET), high impact polystyrene (HIPS), polypropylene (PP) etc.