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Synthetic Fibres and Fabrics (Class VIII)

The Test is on Synthetic Fibres and Fabrics.

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

In which of the following do the cross-links prevent the displacement of individual polymer chains on being heated?

a. Bakelite
b. Melamine
c. Polythene
d. PVC

  1. Only a and b
  2. Only b and c
  3. Only a and c
  4. Only b and d
  5. Only a and d
Question 2 Multiple Choice (Single Answer)

Which of the following is chemically identical to cotton and is used in medical field for making bandages and surgical dressings?

  1. Nylon
  2. Rayon
  3. Polyester
  4. Acrylic
  5. None of the above
Question 3 Multiple Choice (Single Answer)

Which of the following is used for making conveyor belts and sails of sail-boats?

  1. Polyester
  2. Acrylic
  3. Bakelite
  4. Polyvinyl chloride
  5. Melamine
Question 4 Multiple Choice (Single Answer)

The manufacturing of which of the following fibers is helping in the conservation of forests?

a. Nylon
b. Polyester
c. Rayon
d. Acrylic

  1. Only c
  2. Only a and c
  3. Only b, c and d
  4. Only a, b and d
  5. Only c and d
Question 5 Multiple Choice (Single Answer)

Which of the following is a fire-resistant plastic and is also used to make special microwaveable cookware?

  1. Teflon
  2. Bakelite
  3. PVC
  4. Melamine
  5. Polythene
Question 6 Multiple Choice (Single Answer)

Which of the following can be made by the process of polymerisation and is lightweight, soft and warm?

  1. Terylene
  2. Nylon
  3. Terrycot
  4. Acrylic
  5. Rayon
Question 7 Multiple Choice (Single Answer)

Which of the following is obtained from the polymerisation of a chemical compound called ethene?

  1. PVC
  2. Acrylic
  3. Polyester
  4. Polythene
  5. Nylon
Question 8 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. A polymer is a very big molecule formed by the combination of a large number of small molecules.
b. Clothes made of synthetic fibers have a very smooth texture.
c. Handle of a toothbrush should be made of thermoplastic and its bristles of thermosetting plastic.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 9 Multiple Choice (Single Answer)

Rayon is a semi-synthetic fiber. Which of the following is not a use of rayon?

  1. It is used for making tyre cord.
  2. It is used for making soles of electric irons.
  3. It is used for making carpets.
  4. It is used for making sarees, dresses, socks etc.
  5. It is used for making bed-sheets, curtains, blankets etc.
Question 10 Multiple Choice (Single Answer)

Which of the following properties makes rayon different from truly synthetic fibers?

  1. It is chemically identical to cotton.
  2. It has a shine like that of silk.
  3. It is obtained from wood pulp.
  4. Rayon is costlier than natural silk.
  5. It can be dyed in variety of colours.
Question 11 Multiple Choice (Single Answer)

Non-biodegradable materials do not rot away on their own and cause pollution. Which of the following is not a non-biodegradable waste?

  1. Aluminium can
  2. Glass
  3. Plastic
  4. Tin
  5. Jute
Question 12 Multiple Choice (Single Answer)

Which of the following statements is/are false?

a. Thermoplastics are used for making those articles that may get too hot during use and are hard and rigid.
b. In thermoplastics, the long polymer chains are not cross-linked with one another.
c. Plastics are chemically unreactive and do not react with air and water.

  1. Only a
  2. Only a and b
  3. Only b
  4. Only b and c
  5. Only c
Question 13 Multiple Choice (Single Answer)

Articles made of which of the following cannot be recycled?

a. Bakelite
b. Polythene
c. Melamine
d. PVC

  1. Only a and b
  2. Only b and c
  3. Only a and c
  4. Only b and d
  5. Only a and d
Question 14 Multiple Choice (Single Answer)

Nylon was developed in New York and London. Which of the following is not a property of nylon fiber?

  1. It is non-elastic, heavyweight and non-lustrous.
  2. It absorbs very little water.
  3. It is wrinkle resistant.
  4. It has a high abrasion resistance.
  5. It is not attacked by moths and ordinary chemicals.
Question 15 Multiple Choice (Single Answer)

Which of the following pairs represents cellulose polymers?

  1. Nylon and cotton
  2. Rayon and cotton
  3. Rayon and silk
  4. Nylon and acrylic
  5. Acrylic and polyester
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