1. The strongest fibre is called:
(a) rayon
(b) nylon
(c) acrylic
(d) none of these.
2. The first man-made fibre is
(a) nylon
(b) polyester
(c) rayon
(d) cotton.
3. The polyester is made up of
(a) nylon
(b) rayon
(c) esters
(d) cotton
4. The nylon is prepared first in
(a) 1921
(b) 1931
(c) 1941
(d) 1951.
5.The fibre made up by the chemical treatment of wood pulp is
(a) rayon
(b) nylon
(c) polyester
(d) none of these.
6.A synthetic fibre which works like wool.
(a) nylon
(b) polyester
(c) acrylic
(d) PVC.
7. The raw materials used in making nylon
(a) wood pulp
(b) cellulose
(c) coal, water, air
(d) all of these
8.PET is a very familiar form of
(a) chemical
(b) monomer
(c) polyester
(d) polyphenyl
9. Rayon clothes are comfortable to wear in :
(a) winter
(b) rainy
(c) both a & b
(d) summers
10. Synthetic fibres are also known as-
(a) branched fibre
(b) straight fibre
(c) man-made fibre
(d) none of these
B. Answer the following questions -
1. Explain why some fibres are called synthetic.
2. Explain the difference between natural fibres and synthetic fibres.
Answers
Answer:
pls mark it as the brainliest answer
Explanation:
1.nylon
2.nylon
3.esters
4.1931
5.rayon
6. acrylic
7.polyester
8.summers
9. fibres are called as synthetic fibers because these are manmade fibers made by chemicals. These are made of small units that join together to form long chains.
10.Natural fabrics are made of fibers that are produced by animals and plants. Synthetic fabrics are "man-made" fibers that are created in laboratories.
Natural fibres take a lot of time to dry whereas synthetic fibres dry up faster.
Natural fibres are expensive whereas synthetic fibres are cheap and readily available
Answer:
school - ST. Mary's school
Class - 8
Address- moradabad, up
Explanation:
ahahaha i know it right
dont copy paste question paper anywhere like this lol