CBSE Class 8 Science - MCQ and Online Tests - Unit 3 - Synthetic Fibres and Plastics

CBSE Class 8 Science – MCQ and Online Tests –  Unit 3 – Synthetic Fibres and Plastics

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CBSE Class 8 Science – MCQ and Online Tests –  Unit 3 – Synthetic Fibres and Plastics

Choose the correct option in the following questions:

Question 1.
Which of the following cannot be recycled?
(a) Toys
(b) Cooker handles
(c) Carry bags
(d) Plastic chair

Answer

Answer: (b) Cooker handles

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Question 2.
Which of the following is natural fibre obtained from plants?
(a) Cotton
(b) Wool
(c) Rayon
(d) Ketone

Answer

Answer: (a) Cotton

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Question 3.
The plastic which cannot be recycled is
(a) jute
(b) rayon
(c) petrochemicals
(d) bakelite

Answer

Answer: (d) bakelite

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Question 4.
Polymers are made up of small units called
(a) layers
(b) molecules
(c) cells
(d) monomers

Answer

Answer: (d) monomers

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Question 5.
The strongest synthetic fibre is
(a) nylon
(b) rayon
(c) polyester
(d) acrylic

Answer

Answer: (a) nylon

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Question 6.
Wood pulp is used to make
(a) plastic
(b) wool
(c) jute
(d) rayon

Answer

Answer: (d) rayon

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Question 7.
Which of the following is a natural fibre?
(a) Wool
(b) Nylon
(c) PVC
(d) Polythene

Answer

Answer: (a) Wool

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Question 8.
Melamine is
(a) thermoplastic polymer
(b) thermosetting polymer
(c) fibre
(d) elastomer

Answer

Answer: (b) thermosetting polymer

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Question 9.
Fibre produced in factories is called
(a) man-made fibre
(b) natural fibre
(c) synthetic fibre
(d) both (a) and (c)

Answer

Answer: (d) both (a) and (c)

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Question 10.
PET is a
(a) polyester
(b) polyamide
(c) nylon
(d) thermosetting polymer

Answer

Answer: (a) polyester

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Question 11.
Which of the following is non-biodegradable?
(a) Paper
(b) Cotton cloth
(c) Wood
(d) Plastic

Answer

Answer: (d) Plastic

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Question 12.
What is the other name for artificial silk?
(a) Nylon
(b) Rayon
(c) Acrylic
(d) Polyester

Answer

Answer: (b) Rayon

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Question 13.
Which fibre is used as artificial wool?
(a) Acrylic
(b) Rayon
(c) Nylon
(d) Cotton

Answer

Answer: (a) Acrylic

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Question 14.
Bakelite is an example of
(a) fibre
(b) elastomer
(c) nylon
(d) thermosetting polymer

Answer

Answer: (d) thermosetting polymer

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Question 15.
Which term is used for polymers made up of a large number of glucose units?
(a) Protein
(b) Fructose
(c) Cellulose
(d) Polyester

Answer

Answer: (c) Cellulose

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