Synthetic Fibres and Plastics Test - 8

Thermoplastic is a type of plastic that can be softened or bent easily by heating and hardened by cooling. e.g., PVC, Polythene etc.

Plastic is non-reactive, light, strong and durable. It is easily remouldable. All these properties   make   plastic   most convenient for its use.

Most of the synthetic fibres are prepared from petrochemicals.

The correct combination is: a-4, b-1,c-2,d-3 (i) Silk - Saree (ii) Nylon - Rope (iii) Acrylic - Sweater (iv) Plastic ? Bottle

Plastic/metal cans, etc., are the materials which cannot be decomposed by natural processes. Hence, they are non - biodegradable.

Polythene is formed   by the polymerization of ethylene. Polymerization is a process in which molecules of the same or different compounds are joined together to form a long chain of molecules called polymers.

The plastics which can be remoulded are called thermoplastics. e.g., Polythene, PVC etc.

All synthetic products/chemicals are non-biodegradable and cannot be decomposed easily.

Plastic when coated with melamine becomes fire proof. These materials are used for preparing fabrics for fire-men, and making kitchen ware etc.

Terylene fibres are made up of chemical substances called esters.