Class 8 Science – Chapter 3
Synthetic Fibres and Plastics
MCQs (Exam Level)
-
Rayon is obtained from:
a) Cotton
b) Plastic
c) Wood pulp
d) Silk
Answer: c) Wood pulp -
Which of the following is NOT a synthetic fibre?
a) Nylon
b) Rayon
c) Polyester
d) Wool
Answer: d) Wool -
The first fully synthetic fibre is:
a) Rayon
b) Polyester
c) Nylon
d) Acrylic
Answer: c) Nylon -
Which plastic is used to make electrical switches?
a) PVC
b) Polythene
c) Bakelite
d) Teflon
Answer: c) Bakelite -
Plastics are harmful to the environment because they are:
a) Biodegradable
b) Recyclable
c) Non-biodegradable
d) Lightweight
Answer: c) Non-biodegradable -
Which of the following is a thermosetting plastic?
a) PVC
b) Polythene
c) Bakelite
d) Nylon
Answer: c) Bakelite -
Teflon is commonly used for making:
a) Bottles
b) Toys
c) Non-stick cookware
d) Bags
Answer: c) Non-stick cookware -
Which property makes synthetic fibres suitable for sportswear?
a) Absorb water easily
b) Dry quickly
c) Tear easily
d) Heavy weight
Answer: b) Dry quickly -
Acrylic fibre resembles:
a) Cotton
b) Silk
c) Wool
d) Jute
Answer: c) Wool -
Burning plastics is dangerous because it:
a) Produces oxygen
b) Produces toxic gases
c) Improves air quality
d) Is eco-friendly
Answer: b) Produces toxic gases
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