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- 1. Multiple Choice
A chain of small chemical units combined to form a large single unit is called ____
a) Polymer
b) Poly
- 2. Multiple Choice
Polythene and PVC are examples of
a) Bio degradable substance
b) Thermoplastics
- 3. Multiple Choice
Plastics which when moulded once, cannot be softened by heating. Such plastics are called
Polyster
Thermosetting Plastics
- 4. Fill in the Blank
Polycot is made by mixing two types of fibres namely
- 5. Fill in the Blank
The 4 R Principle is
- 6. Fill in the Blank
_____________ is an example of natural polymer
- 7. Multiple Choice
Which of the following is Non-biodegradable
Woolen clothes
Plastic Bag
- 8. Multiple Choice
Bakelite and Melamine are examples of
Silk
Thermosetting Plastics
- 9. Fill in the Blank
Fire proof plastic uniform worn by fire fighters has a coating of _____ to make it fire resistant
- 10. Multiple Choice
The coating on modern non- stick cookware and electric iron is of
Terrycot
Teflon
- 11. Fill in the Blank
Linear and lightly cross-linked polymers form a class of plastics are called _________
- 12. Fill in the Blank
Polytetrafluoroethylene was discovered by ____________ in 1938.
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