Olympiad – Class VIII – Science - Che - Synthetic Fibres and Plastics

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Question - 1

From which part of sheep is wool made from?

  • A Skin
  • B Toes
  • C Fleece
  • D All of the above

Question - 2

What is the process of taking out silk threads from the-cocoon known as?

  • A Rearing
  • B Sorting
  • C Scouring
  • D Reeling

Question - 3

What do silk fibres consist of?

  • A Vitamins
  • B Carbohydrates
  • C Proteins
  • D Fats

Question - 4

Which of these provide compounds necessary to prepare nylon?

  • A Only (i)
  • B Only (i) and (ii)
  • C Only (i) and (iii)
  • D (i), (ii) and (iii)

Question - 5

Why is nylon useful?

  • A It is soft, strong and light.
  • B It is transparent, light and easy to wash
  • C It is strong, elastic and light.
  • D It is soft, inexpensive and strong.

Question - 6

Which of the following statements is NOT true?

  • A Fabric is made of yarn.
  • B Jute is the outer covering of the coconut
  • C Polyester is a synthetic fibre.
  • D Silk fibre is obtained from silkworms

Question - 7

Fruits have characteristic smells. Which of these chemicals is responsible for it?

  • A Yeas
  • B Alcohol
  • C Cellulose
  • D Esters

Question - 8

Which of the following articles is made by using only man-made substances?

  • A
  • B
  • C
  • D

Question - 9

Which of the following is made from coconut fibre?

  • A Sweaters
  • B Shoes
  • C Mattresses
  • D Sarees

Question - 10

Which of the following statements is NOT true?

  • A Polymers occur in nature.
  • B Nylon is used in the making of parachutes.
  • C Cellulose is made up of glucose units.
  • D Nylon thread is weaker than cotton thread