Question

2.
Which of the following is used for making lightweight sail?
(a) Nylon
(b) Polyester
(c) Rayon
(d) Acrylic
3. Which of the following is a thermosetting plastic?
(a) PVC
(b) Teflon
(c) Bakelite
(d) Nylon
4. The artificial silk prepared from cellulose is called :
(a) polythene
(b) polyester
(c) rayon
(d) nylon
5. Which of the following is also used as a substitute for glass?
(a) Polystyrene
(b) Perspex
(c) PVC
(d) Teflon​

Answer 1

Answer:

1. 3 =Bakelite

Explanation:

baki sab nahi pata

par please Branlist mark kar na please,

Answer 2

Answer

2- polyester

3- Bakelite

4- Rayon

5- Teflon