Q74 of 83 Page 57

The similarity between artificial silk and cotton is that:

Rayon is obtained by the chemical treatment of wood pulp or cellulose. It is the man-made fibre which is regarded as artificial silk.

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72

Which of the following plastics is used for making electric switches?

 73

Which of the following are thermosetting polymers?

(A) Melamine


(B) Terylene


(C) Polythene


(D) Bakelite

 75

Which of the following plastic objects can be recycled?

(A) Electric socket


(B) Polythene bag


(C) PVC pipe


(D) Ashtray

 76

Match the terms of column A correctly with the phrases given in column B:

Column A


(i) Polyester


(ii) Teflon


(iii) Rayon


(iv) Nylon


Column B


(a) Prepared by using wood pulp


(b) Used for making parachutes


(c) Used to make non- stick cookware


(d) Fabrics do not wrinkle easily