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: