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

2. Polythene and PVC are examples of

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

4. Polycot is made by mixing two types of fibres namely

5. The 4 R Principle is

6. _____________ is an example of natural polymer

7. Which of the following is Non-biodegradable

8. Bakelite and Melamine are examples of

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

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