MCQ questions for class 8 Science Chapter 3 Synthetic Fibres and Plastics
Question 1: Which of the following is a natural fibre?
Nylon
Polyester
Cotton
Rayon
Question 2: What is the process of making fabric from fibres called?
Spinning
Weaving
Knitting
Felting
Question 3: Which of the following is a synthetic fibre?
Cotton
Silk
Rayon
Polyester
Question 4: What is the main constituent of natural gas?
Polyethylene
Polypropylene
Polyester
Polyvinyl chloride
Question 5: Which of the following is a property of synthetic fibres?
Biodegradable
Absorbent
Breathable
Durable
Question 6: Which synthetic fibre is known as artificial silk?
Nylon
Polyester
Acrylic
Rayon
Question 7: What is the process of making yarn from fibres called?
Weaving
Knitting
Spinning
Felting
Question 8: Which of the following is a thermoplastic polymer?
Bakelite
Polyethylene
Melamine
Polyvinyl chloride
Question 9: Which of the following is a property of plastics?
Biodegradable
Non-biodegradable
Easily decomposed
Absorbs water easily
Question 10: What is the process of arranging two sets of yarn together to make a fabric?
Spinning
Weaving
Knitting
Felting
Question 11: Which of the following is a biodegradable polymer?
Polyethylene
Polypropylene
Polystyrene
Starch-based plastic
Question 12: What is the term for the property of plastics to regain their original shape after being stretched or deformed?
Elasticity
Malleability
Durability
Flexibility
Question 13: Which of the following is a natural polymer?
Polyethylene
Polypropylene
Polystyrene
Starch
Question 14: What is the term for the property of plastics to change their shape permanently when subjected to heat and pressure?
Elasticity
Malleability
Durability
Mouldability
Question 15: Which of the following is an example of a thermosetting plastic?
Polyethylene
Polypropylene
Bakelite
Polyvinyl chloride
Question 16: Which synthetic fibre is known for its high strength and is used in making parachutes and ropes?
Nylon
Polyester
Acrylic
Rayon
Question 17: What is the term for the process of converting fibres into fabric by interlacing two sets of yarn?
Spinning
Weaving
Knitting
Felting
Question 18: Which of the following is a property of natural fibres?
Non-absorbent
Durable
Easily melted
Biodegradable
Question 19: What is the term for the property of plastics to be drawn into thin wires?
Elasticity
Malleability
Durability
Ductility
Question 20: Which of the following is a synthetic fibre?
Cotton
Silk
Jute
Nylon
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