Class 8 Science – Chapter 3
Synthetic Fibres and Plastics
MCQs (Exam Level)

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1. Synthetic fibres are made from
   A. Natural plants
   B. Animal hair
   C. Chemical substances
   D. Cotton fibres
   Answer: C


2. Which of the following is known as artificial silk?
   A. Nylon
   B. Rayon
   C. Polyester
   D. Acrylic
   Answer: B


3. Which fibre is commonly used to make sweaters and shawls?
   A. Rayon
   B. Nylon
   C. Acrylic
   D. Polyester
   Answer: C


4. The plastic which can be recycled is called
   A. Thermosetting plastic
   B. Bakelite
   C. Melamine
   D. Thermoplastic
   Answer: D


5. Which plastic is used for making electrical switches?
   A. Polythene
   B. PVC
   C. Bakelite
   D. Teflon
   Answer: C


6. Why should plastics not be burnt?
   A. They melt easily
   B. They produce toxic gases
   C. They dissolve in water
   D. They shrink
   Answer: B


7. Which of the following is NOT a property of plastics?
   A. Lightweight
   B. Durable
   C. Biodegradable
   D. Strong
   Answer: C


8. Nylon was first prepared in the year
   A. 1911
   B. 1920
   C. 1931
   D. 1940
   Answer: C


9. Which material is best suited for making parachutes?
   A. Cotton
   B. Wool
   C. Nylon
   D. Silk
   Answer: C


10. Plastics are non-biodegradable because
    A. They are heavy
    B. Microorganisms cannot decompose them
    C. They dissolve in soil
    D. They melt easily
    Answer: B

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⭐ These MCQs are important for school & competitive exams