Synthetic Fibres & Plastics

A chain of small chemical units combined to form a large single unit is called ____

• a) Polymer

• b) Poly

Polythene and PVC are examples of

• a) Bio degradable substance

• b) Thermoplastics

Plastics which when moulded once, cannot be softened by heating. Such plastics are called

• Polyster

• Thermosetting Plastics

Polycot is made by mixing two types of fibres namely

The 4 R Principle is

_____________ is an example of natural polymer

Which of the following is Non-biodegradable

• Woolen clothes

• Plastic Bag

Bakelite and Melamine are examples of

• Silk

• Thermosetting Plastics

Fire proof plastic uniform worn by fire fighters has a coating of _____ to make it fire resistant

The coating on modern non- stick cookware and electric iron is of

• Terrycot

• Teflon