11. Which of the following is used as non-stick coating for cooking utensils?
12. The fibre least prone to catch fire is
13. Which of the following is used to make light weight, but strong plastic ?
14. Which of the following fibres catches fire least ?
15. Non-stick kitchenwares are coated with
16. Terylene is a condensation polymer of ethylene glycol and which acid?
17. The material known in commerce as Terylene is a
18. Nylon is a type of
19. Nylon is made up of :
20. Nylon threads are made of
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