Class 8 Science Synthetic Fibres and Plastics Important MCQs

Here are some important multiple choice question for you to revise from Synthetic Fibres and plastics


1. The purest natural form of cellulose is :-

a. rayon

b. cotton

c. wool

d. silk 

 Ans:b

2. Rayon clothes are comfortable to wear in:-

a. winters

b. rainy season

c. both a & b

d. summers 

 Ans:d

3. The first fully synthetic plastic was :-

a. bakelite

b. melamine

c. teflon

d. polythene 

 Ans:a

4. The non stick coating on pans and other cooking

utensils is made from :-

a. rayon

b. teflon

c. melamine

d. PVC 

Ans:b

5. Which of the following is not a part of 4R’s formula :-

a. reduce

b. recycle

c. recover

d. reinvent 

Ans:d

6. Synthetic plastics lead to :-

a. water pollution

b. air pollution

c. solid waste pollution

d. all the above 

Ans:d

7. Rayon is made from :-

a. wood pulp

b. bark of the tree

c. dry leaves

d. petroleum products 

Ans:a

8. Acrylic fibres are advantageous over :-

a. cotton

b. wool

c. silk

d. jute 

Ans:b

9. Polyester is a long chain polymer of a chemical

substance called :-

a. aldehyde

b. ester

c. alcohol

d. ethene 

Ans:b

10. Which of the following represent the smallest u

nits of a polymer :-

a. tetramer

b. dimer

c. monomer

d. octamer 

Ans:c

11. A regenerated synthetic fibre is :-

a. rayon

b. nylon

c. terylene

d. polythene 

Ans:a

12. The first fully synthetic fibre is :-

a. rayon

b. nylon

c. Acrylic

d. Polyester 

Ans:b

13. The polymers in which smaller units are linked

to each other in straight arrangement

are called :-

a. cross-linked polymers

b. branched polymers

c. linear polymers

d. all the above 

Ans:c

14. A plastic which can be softened on heating and

moulded repeatedly is called :-

a. thermoplastic

b. thermosetting plastic

c. thermolabile plastic

d. both b & c 

Ans:a

15. The synthetic plastic used for making insulatio

n cover in electrical wires/cables is :-

a. Bakelite

b. Melamine

c. Polyvinyl chloride

d. Polystyrene 

Ans:c

16. Plastics are :-

a. cheaper

b. durable

c. nonreactive

d. all the above 

Ans:d