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Synthetic Material

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Number of Questions: 15
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Tags: Polymer Rayon Nylon PVC Polyester Properties of Synthetic Fibres and their Applications Plastics and their Types Environmental Effects of Plastics Properties of Acids and Bases
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Which of the following is not a property of rayon fabrics?

  1. It can be easily dyed in wide range of colours.

  2. Its fabrics are soft, smooth, cool and comfortable.

  3. They are highly absorbent.

  4. They do not insulate body heat.

  5. They are ideal for cold climates.

Show answer
Correct Option: E
Explanation:

Rayon fabrics are suitable for hot and humid climates. 

Which of the following is known as artificial silk?

  1. Nylon

  2. Rayon

  3. Polyester

  4. Terene

  5. Dacron

Show answer
Correct Option: B
Explanation:

Rayon is known as artificial silk.

Find the odd one out.

  1. Polyvinyl chloride

  2. Melamine formaldehyde

  3. Polypropylene

  4. Polystyrene

  5. Polyethylene

Show answer
Correct Option: B
Explanation:

Melamine formaldehyde is a thermosetting plastic. Hence, it is the odd one among the given options.

A type of plastic that can be a good substitute for glass is

  1. melamine formaldehyde

  2. perspex

  3. polypropylene

  4. polystyrene

  5. teflon

Show answer
Correct Option: B
Explanation:

Perspex is a kind of plastic that can be a good substitute for glass, and is used in making window panes of aeroplanes and cars.

Which of the following is a renewable resource?

  1. Rayon

  2. Nylon

  3. Acrylic

  4. Bakelite

  5. Teflon

Show answer
Correct Option: A
Explanation:

Rayon is a synthetic fibre made up of wood pulp, which is a renewable resource.

Which of the following materials is used to make non-stick pans?

  1. Bakelite

  2. Teflon

  3. Perspex

  4. Polypropylene

  5. Polystyrene

Show answer
Correct Option: B
Explanation:

Teflon is used to make non-stick pans.

What does PTFE stand for?

  1. Polytetrafluoroethylene

  2. Polytetrafluoroethyne

  3. Polytetraformaldehyde

  4. Polyvinyl tetrafluoride

  5. Polystyrene

Show answer
Correct Option: A
Explanation:

PTFE stands for polytetrafluoroethylene.

Bakelite is also known as

  1. polyvinyl chloride

  2. polystyrene

  3. melamine formaldehyde

  4. phenolic

  5. polypropylene

Show answer
Correct Option: D
Explanation:

Bakelite is also known as phenolic.

Which of the following plastics is used for making shoes?

  1. Teflon

  2. Bakelite

  3. PVC

  4. Polypropylene

  5. Perspex

Show answer
Correct Option: C
Explanation:

PVC plastics are used to make shoes.

Thermoplastics are those, which

  1. can be remoulded on heating

  2. cannot be remoulded on heating

  3. are prepared from cellulose

  4. are prepared by mixing polyester and cotton

  5. are insulators of heat and electricity

Show answer
Correct Option: A
Explanation:

The plastic which can be remoulded on heating is said to be thermoplastic.

The process of recycling thermosetting plastics is known as

  1. hydrolysis

  2. electrolysis

  3. esterification

  4. polymerisation

  5. pyrolysis

Show answer
Correct Option: E
Explanation:

The process of recycling thermosetting plastics is known as pyrolysis.           

Which of the following are not used for making polyester? (a) Dihydric alcohol (b) Carboxylic acid (c) Ethylene (d) Terephthalic acid (e) Ethane

  1. Only (a) and (b)

  2. Only (b) and (c)

  3. Only (c) and (d)

  4. Only (b) and (e)

  5. Only (c) and (e)

Show answer
Correct Option: E
Explanation:

Polyester is formed by esterification condensation of polyfunctional alcohols and acids. Here, ethylene and ethane are not used to prepare polyster.           

Why are polyethylene terephthalate plastics preferred to make containers for carbonated drinks?

  1. They are very strong.

  2. They are less gas permeable than other plastics.

  3. They are abrasion resistant.

  4. They are glassy transparent materials.

  5. They are the hardest of all plastics.

Show answer
Correct Option: B
Explanation:

Polyethylene terephthalate plastics commonly abbreviated as PET are less gas permeable than other plastics. Hence, they are popular materials for making bottles for carbonated drinks. The beverages kept in bottles, made from PET, do not lose their taste for a long time.

Which of the following statements is incorrect for nylon?

  1. Nylon is thermoplastic in nature.

  2. It is made from coal, water and air.

  3. It is a polymer of an ester.

  4. Its fabrics are wrinkle resistant.

  5. It was first prepared by Wallace Carothers at DuPont chemical company.

Show answer
Correct Option: C
Explanation:

Nylon is polymer of amine.

Match the following and choose a correct option. Column A Column B (a) Celluloid i. Thermocol (b) Bakelite ii. Window glass (c) Perspex iii. Electric switches (d) Polystyrene iv. Soap case

  1. (a) - i, (b) - ii, (c) - iii, (d) - iv

  2. (a) - i, (b) - iii, (c) - ii, (d) - iv

  3. (a) - iv, (b) - ii, (c) - iii, (d) - i

  4. (a) - iv, (b) - iii, (c) - i, (d) - ii

  5. (a) - iv, (b) - iii, (c) - ii, (d) - i

Show answer
Correct Option: E
Explanation:

Celluloid is used to make soap case while electric switches are made of bakelite. Perspex is a substitute for glass. Hence, it is used for making window glasses. Thermocol is made from polystyrene.        

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