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WorksheetsSynthetic Fibres & Plastics
Total questions: 12
Worksheet time: 9mins
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
(a)
The 4 R Principle is
(a)
(a) 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 (a) to make it fire resistant
The coating on modern non- stick cookware and electric iron is of
Terrycot
Teflon
Linear and lightly cross-linked polymers form a class of plastics are called (a)
Polytetrafluoroethylene was discovered by (a) in 1938.
