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MCQ Questions for Class 8 Science with Answers
Q1. Synthetic fibres are:
(i) strong
(ii) durable
(iii) hining
(iv) all of these
(iv) all of these
Q2. Which of the following is synthetic fibre?
(i) Nylon
(ii) Cotton
(iii) Silk
(iv) Wood
(i) Nylon
Q3. Fabric is made of
(i) steel
(ii) fibre
(iii) paper
(iv) none of these
(ii) fibre
Q4. Which fibre is used as artificial wool?
(i) Acrylic
(ii) Rayon
(iii) Nylon
(iv) Cotton
(i) Acrylic
Q5. Polythene and PVC are examples of
(i) Bio degradable substance
(ii) Thermosetting plastics
(iii) Thermoplastics
(iv) Rayon
(iii) Thermoplastics
Q6. The nylon is prepared first in
(i) 1921
(ii) 1931
(iii) 1941
(iv) 1951
(ii) 1931
Q7. Which of the following is not thermoplastics:
(i) acrylic
(ii) polyethylene
(iii) polystyrene
(iv) melamine
(iv) melamine
Q8. Raw materials for preparation of synthetic fibres are obtained from
(i) coal
(ii) petroleum
(iii) natural gas
(iv) all of these
(iv) all of these
Q9. Which of the following set of features belong to thermoplastics ?
(i) soft and brittle
(ii) hard and strong
(iii) hard and less brittle
(iv) soft and less brittle
(iv) soft and less brittle
Q10. The strongest synthetic fibre is
(i) nylon
(ii) rayon
(iii) polyester
(iv) acrylic
(i) nylon
Q11. The 4 R Principle is
(i) Reduce, Reuse, Recycle, Recover
(ii) Remember, reduce, Recycle, Rejoice
(iii) Repeat, Rejoice, recycle, reduce
(iv) None of the above
(i) Reduce, Reuse, Recycle, Recover
Q12. A synthetic fibre which works like wool.
(i) Nylon
(ii) Polyester
(iii) Acrylic
(iv) PVC
(iii) Acrylic
Q13. PET is form of:
(i) steel
(ii) glass
(iii) polyester
(iv) nylon
(iii) polyester
Q14. In which year was nylon made?
(i) 1931
(ii) 1964
(iii) 1948
(iv) 1950
(i) 1931
Q15. Statement incorrect for synthetic fibres is/are
(i) non-biodegradable
(ii) very expensive
(iii) long lasting
(iv) all the above
(ii) very expensive
Q16. Melamine is
(i) thermoplastic polymer
(ii) thermosetting polymer
(iii) fibre
(iv) elastomer
(ii) thermosetting polymer
Q17. Which of the following is Non-biodegradable
(i) Woolen clothes
(ii) Plastic bag,
(iii) Cotton cloth
(iv) Wood
(ii) Plastic bag
Q18. Which of the following is a natural fibre obtained from plants?
(i) Cotton
(ii) Wool
(iii) Rayon
(iv) Ketone
(i) Cotton
Q19. Which of the following is used for making parachutes and stockings:
(i) polyester
(ii) teflon
(iii) rayon
(iv) nylon
(iv) nylon
Q20. Which of the following fibre has highest tensile strength?
(i) Cotton
(ii) Silk
(iii) Rayon
(iv) Nylon
(iv) Nylon
Q21. A man- made fibre obtained from natural source is :
(i) Acrylic
(ii) Nylon
(iii) Rayon
(iv) Polyester
(iii) Rayon
Q22. Which of the following cannot be recycled?
(i) Toys
(ii) Cooker handles
(iii) Carry bags
(iv) Plastic chair
(ii) Cooker handles
Q23. The coating on modern non- stick cookware and electric iron is of
(i) Terrycot
(ii) Rayon
(iii) Polyester
(iv) Teflon
(iv) Teflon
Q24. The plastics which do not remould again on heating are called:
(i) thermosetting plastics
(ii) thermoplastics
(iii) both of the above
(iv) none of the above
(i) thermosetting plastics
Q25. Wood pulp is used for preparation of:
(i) polyester
(ii) teflon
(iii) rayon
(iv) nylon
(iii) rayon
Q26. Polymers are made up of small units called
(i) layers
(ii) molecules
(iii) cells
(iv) monomers
(iv) monomers
Q27. Raw materials for the synthetic fibres are derived from :
(i) petroleum products
(ii) plant products
(iii) animal products
(iv) only coal
(i) petroleum products
Q28. Bakelite is an example of
(i) fibre
(ii) elastomer
(iii) nylon
(iv) thermosetting polymer
(iv) thermosetting polymer
Q29. Which of the following once set do not soften on heating:
(i) thermoplastic
(ii) thermosetting plastic
(iii) polvthene
(iv) none of these
(ii) thermosetting plastic
Q30. Which one is artificial silk?
(i) Teflon
(ii) Nylon
(iii) Fibroin
(iv) Rayon
(iv) Rayon
Q31. Food hems are stored ¡n plastic containers because they are:
(i) corrosive
(ii) non-corrosive
(iii) easy to handle
(iv) all of these
(ii) non-corrosive
Q32. Which of the following are made from thermosetting plastic?
(i) Bottles
(ii) Crockery
(iii) Shoes
(iv) Handbags
(ii) Crockery
Q33. Which of the following materials is the best for making garments and jackets that can be used in wet or damp environment?
(i) Polyester
(ii) Wool
(iii) Cotton
(iv) None of these
(i) Polyester
Q34. A synthetic fibre resembling wool is:
(i) rayon
(ii) nylon
(iii) acrylic
(iv) none of these
(iii) acrylic
Q35. Unbreakable kitchenware is made from :
(i) PVC
(ii) Bakelite
(iii) Melamine
(iv) PTFE
(iii) Melamine
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