Tag: garbage in, garbage out

Thermoplastics on heating get deformed (its shape and size can be altered) and thus can also be bent. On the other hand, thermosetting plastics cannot be bent once moulded. Some examples of Thermoplastics are – Polythene and PVC. Some examples of Thermosetting plastics are – Bakelite and Melamine.

A material which is not easily decomposed by natural processes is termed as $\text {non-biodegradable material}$. Examples are polyethene, PVC, PS. It takes many years for decomposition. Hence, option B is correct.

Plastics in health care industry are used in packaging of medicines;plastic threads are used for stitching wounds. Also syringes, gloves and many kind of medical instruments are made up of plastic.

Plastics are used to store food because:
(i) Plastics are light in weight.
(ii) Plastic is a strong and durable material and
(iii) plastics are easy to handle.

 Telephone instruments, plastic toys, ball point pens, plastic bowls  are thermoplastics and so can be recycled.
Cooker handles, carry bags, plastic covering on electric wire, plastic chains etc are thermosetting plastics and so cannot be recycled.

Plastic is also a polymer like the synthetic fibre. It is the chain of small units joined together.

A thermoplastic is the material which become soft on heating and hard on cooling several times.
Therefore, they can be recycled.

Plastic has light weight, lower price, good strength and easy to handle. Therefore, container are made from plastic.

Polyethylene is a thermoplastic polymer consisting of long hydrocarbon chains. Polyethylene or polythene is the most common plastic. Its primary use is in packaging (plastic bag, plastic films, containers including bottles, etc.).