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Synthetic Fibres and Plastic

Description: Synthetic Fibers and Plastic
Number of Questions: 25
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Tags: Science Plastics and Their Properties Types of Synthetic Fibers and Their Characteristics. Synthetic Fibres and Fabrics Synthetic Fibres and Plastics Properties of Synthetic Fibres and their Applications Plastics and The Environment Degradation Plastics and their Types
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Which of the following is used for making electrical switches and plugs because it does not become soft on heating?

  1. Teflon

  2. Polythene

  3. PVC

  4. Bakelite

  5. Nylon

Show answer
Correct Option: D
Explanation:

Bakelite is the correct option, as it does not become soft on heating.

Which of the following is also called an artificial silk?

  1. Acrylic

  2. Rayon

  3. Terylene

  4. Nylon

  5. Terrycot

Show answer
Correct Option: B
Explanation:

This is the correct option. Rayon is also called an artificial silk due to its fineness and lusture.

Which of the following is a man-made fibre made from a natural material called cellulose?

  1. Nylon

  2. Rayon

  3. Polyester

  4. Acrylic

  5. Silk

Show answer
Correct Option: B
Explanation:

This is the correct option. Rayon is a man-made fibre made from a natural material called cellulose.

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 smaller molecules. b. Flax and jute are animal fibres. c. Wool and cotton are natural polymers.

  1. Only a

  2. Only a and b

  3. Only b

  4. b and c

  5. Only c

Show answer
Correct Option: C
Explanation:

Statement 'b' is a wrong statement. Thus, it is the correct option. Flax and jute are plant fibers.

Which of the following is/are the uses of rayon?

a. Rayon is used in the textile industries to make clothings like sarees, dresses, etc. b. Rayon is use in the medical field for making dressings and bandages. c. Rayon is used in the tyre industry for manufacturing tyre cord.

  1. Only a

  2. Only a and b

  3. Only c

  4. Only b and c

  5. All of these

Show answer
Correct Option: E
Explanation:

This is the correct option, as all the above mentioned are the uses of rayon.

Which of the following is not a property of a nylon fibre?

  1. Nylon fibre absorbs very little water.

  2. A nylon fibre is stronger than a polyester fibre.

  3. A nylon fibre is wrinkle resistant.

  4. Nylon fibers have high abrasion resistance.

  5. Nylon fibre is not attacked by moth and ordinary chemicals.

Show answer
Correct Option: B
Explanation:

This option is correct, as it is not a property of  nylon fibre. In fact, a polyester fibre is stronger than a nylon fibre.

Which of the following is not a property of plastic?

  1. Plastics are poor conductors of heat and electricity.

  2. Plastics can be moulded into different shapes.

  3. Plastics are quite cheap and easily made.

  4. Plastics are chemically reactive.

  5. Plastics are strong, light and durable.

Show answer
Correct Option: D
Explanation:

This is the correct option, as plastics are not chemically reactive. They are chemically unreactive. 

Which of the following man made fibre is chemically identical to cotton?

  1. Nylon

  2. Acrylic

  3. Terrycot

  4. Rayon

  5. Terylene

Show answer
Correct Option: D
Explanation:

This is the correct option, as rayon is the man made fibre which is chemically identical to cotton.

Which of the following is/are the uses of polyester fibre? a. Polyester is used for making sails of sail-boats. b. Polyester is used for making water hoses for fire fighting operations. c. It is used for making conveyer belts.

  1. Only a

  2. Only a and b

  3. Only c

  4. b and c

  5. a, b and c

Show answer
Correct Option: E
Explanation:

This is the correct option, as all of the above are the uses of polyester.

Which of the following statements is/are false? a. Polyester is a thermoplastic polymer. b. Polycot is a mixture of polyester and wool. c. A synthetic fibre is a polymer made from the molecules of a monomer or two monomers joined together to form very long chains.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c

Show answer
Correct Option: C
Explanation:

Statement 'b' is a false statement. Thus, it is a correct option. Polycot is a mixture of polyester and cotton.

Which of the following is not a property of synthetic fibres?

  1. Synthetic fibres are very strong.

  2. Synthetic fibres are more durable.

  3. Synthetic fibres are wrinkle resistant.

  4. Synthetic fibres are very light in weight.

  5. Synthetic fibres are good absorbers of water.

Show answer
Correct Option: E
Explanation:

This is the correct option, as this is not a property of synthetic fibres. They absorb very little water, Due to this reason, the clothes made from synthetic fibres dry quickly.

Which of the following synthetic fibres is not prepared from raw materials obtained from petrochemicals?

  1. Nylon

  2. Rayon

  3. Acrylic

  4. Terylene

  5. Terrywool

Show answer
Correct Option: B
Explanation:

This is the correct option, as rayon is not prepared from the raw materials obtained from petrochemicals. 

What type of clothes can melt and stick to the body on heating?

  1. Cotton

  2. Nylon

  3. Jute

  4. Wool

  5. Flax

Show answer
Correct Option: B
Explanation:

This is the correct option. Nylon clothes melt and stick to the body on heating.

Match the following ||| |---|---| |a. Cellulose|1. It is a substance produced by plants and animals that can be spun into a filament, thread or rope.| |b. Natural fiber|2. It is a man-made fibre produced from chemical substances. | |c. Synthetic fiber|3. It is a polymer, which is made up of a large number small glucose molecules joined one after the other.|

  1. a - 3, b - 1, c - 2

  2. a - 3, b - 2, c - 1

  3. a - 1, b - 3, c - 2

  4. a - 1, b - 2, c - 3

  5. a - 2, b - 1, c - 3

Show answer
Correct Option: A
Explanation:

This is the correct option. Cellulose is a polymer, which is made up of a large number small glucose molecules joined one after the other. Natural fibre is a substance produced by plants and animals that can be spun into filament, thread or rope. Synthetic fibre is a man-made fibre produced from chemical substances.

Which of the following sequence of fibres is correct regarding the increasing order of their strength?

  1. Wool, Silk, Nylon, Cotton, Polyester

  2. Nylon, Wool, Cotton, Silk, Polyester

  3. Polyester, Wool, Cotton, Silk, Nylon

  4. Wool, Silk, Nylon, Polyester, Cotton

  5. Wool, Cotton, Silk, Nylon, Polyester

Show answer
Correct Option: E
Explanation:

This is the correct option, as wool fibre is least in strength and polyester has the greatest strength.

Which of the following is not a bio-degradable waste?

  1. Glass

  2. Paper

  3. Cotton cloth

  4. Wood

  5. Woolen clothes

Show answer
Correct Option: A
Explanation:

This is the correct option, as glass is not bio-degradable waste.

Which of the following is used to give non-sticking coating on cookwares?

  1. Melamine

  2. Bakelite

  3. Teflon

  4. PVC

  5. Polythene

Show answer
Correct Option: C
Explanation:

This is the correct option. Teflon is used to give non-sticking coating on cookwares.

Match the following ||| |---|---| |a. Polyester|1. It is a high-strength, resilient synthetic polymer, the molecules of which contain the recurring amide group.| |b. Rayon|2.It is a synthetic fibre in which the polymer units are linked by the ester groups.| |c. Nylon|3.It is a man-made fibre prepared from a natural raw material called cellulose by chemical treatment.|

  1. a - 3, b - 2, c - 1

  2. a - 2, b - 1, c - 3

  3. a - 2, b - 3, c - 1

  4. a - 3, b - 1, c - 2

  5. a - 1, b - 3, c - 2

Show answer
Correct Option: C
Explanation:

This is the correct option. Polyester is a synthetic fibre in which the polymer units are linked by the ester groups. Rayon is a man-made fiber prepared from a natural raw material called cellulose by chemical treatment. Nylon is a high-strength, resilient synthetic polymer, the molecules of which contain the recurring amide group.

Which of the following are thermosetting plastics? a. Teflon b. Bakelite c. PVC d. Melamine

  1. Only b and d

  2. Only a and c

  3. Only a and b

  4. Only c and d

  5. Only a and d

Show answer
Correct Option: A
Explanation:

This is the correct option, as bakelite and melamine are both thermosetting plastics.

In which of the following polymers, long polymer chains are not cross-linked with one-another?

  1. Nylon

  2. Polythene

  3. Teflon

  4. Melamine

  5. Bakelite

Show answer
Correct Option: B
Explanation:

This is the correct option. In polythene, long polymer chains are not cross-linked with one-another.

Match the following 'synthetic fibres' with the 'chemicals from which they are made' ||| |---|---| |a. Acrylic|1. Ester| |b. Polyester|2. Amide| |c. Nylon|3. Acrylonitrile|

  1. a - 3, b - 1, c - 2

  2. a - 3, b - 2, c - 1

  3. a - 2, b - 1, c - 3

  4. a - 2, b - 3, c - 1

  5. a - 1, b - 3, c - 2

Show answer
Correct Option: A
Explanation:

This is the correct option. Acrylic is made from a chemical called acrylonitrile. Polyester is made up of the repeating units of a chemical called ester. Nylon is made up of the repeating units of a chemical called amide.

Which of the following synthetic material can be used to make shatterproof bottles as well as fabric?

  1. Polyester

  2. Rayon

  3. Nylon

  4. Acrylic

  5. Terylene

Show answer
Correct Option: A
Explanation:

Polyester can be used to make shatterproof bottles as well as fabric. Thus, it is the correct option. 

In which of the following polymers, long polymer chains are cross-linked with one-another?

  1. Nylon

  2. Polythene

  3. PVC

  4. Teflon

  5. Melamine

Show answer
Correct Option: E
Explanation:

This is the correct option. In melamine, long polymer chains are cross-linked with one-another.

Which of the following are thermoplastics? A. Polythene B. Bakelite C. PVC D. Malamine

  1. Only A and B

  2. Only B and C

  3. Only A and C

  4. Only C and D

  5. Only B and D

Show answer
Correct Option: C
Explanation:

This is the correct option, as polythene and PVC are both thermoplastics.

Which of the following is used to coat the uniforms of fire-men to make the uniforms fire-resistant?

  1. Polythene

  2. Polyvinyl chloride

  3. Bakelite

  4. Teflon

  5. Melamine

Show answer
Correct Option: E
Explanation:

This is the correct option. Melamine is used to coat the uniforms of fire-men to make the uniforms fire-resistant.

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