Tag: some commercially important polymers

Questions Related to some commercially important polymers

A polymer of prop-$2$-enenitrile is called:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. saran

  2. orlon

  3. dacron

  4. none of the above

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Correct Option: B

The commercial name of poly(methyl methacrylate) is:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Lucite

  2. Plexiglas

  3. Perspex

  4. All the above

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Correct Option: D
Explanation:

Poly(methyl methacrylate) (PMMA) is a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to soda-lime glass. It has since been sold under many different names, including Acrylite, Lucite, Plexiglas and Perspex.

Option D is correct.

Soft drinks and baby-feeding bottles are generally made of:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Polyurea

  2. polyurethane

  3. Polyester

  4. Polyamide

  5. polystyrene

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Correct Option: E
Explanation:

Soft drinks and baby-feeding bottles are generally made of polystyrene which is an addition homopolymer with a linear chain-like structure.
 The monomer is styrene.

GRA is a copolymer of __________________.

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. butadiene and acrylonitrile

  2. butadiene and adipic acid

  3. chloroprene and acrylonitrile

  4. chloroprene and adipic acid

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Correct Option: A

$F _2C=CF _2$ is a monomer of:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Teflon

  2. Glyptal

  3. Buna-S

  4. Nylon 6

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Correct Option: A
Explanation:

Polytetrafluoroethylene (PTFE) or Teflon is formed from the polymerization of tetrafluoroethylene.

Statement 1: Teflon has high thermal stability and chemical inertness.


Statement 2: It has strong C-F bonds.

Choose the correct option:

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Statement 1 is true: Statement 2 is true; statement 2 is the correct explanation of statement 1

  2. Statement 1 is true: statement 2 is true; statement 2 is not the correct explanation of statement 1

  3. Statement 1 is true; statement 2 is false

  4. Statement 1 is false; statement 2 is true

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Correct Option: A

Acrylonitrile forms_____________.

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Terylene

  2. Orlon

  3. PVC

  4. Bakelite

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Correct Option: B

Fomaldehyde is the starting material for the manufacture of :

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. backelite

  2. caprolactam

  3. D.D.T

  4. rayon

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Correct Option: A

Monomer used to prepare orlon is_________.

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. $\displaystyle H _{2}C= CH-Cl$

  2. $\displaystyle F _{2}C= CF _{2}$

  3. $\displaystyle H _{2}C= CHCN$

  4. $H _2C=C(Cl)-CH=CH _2$

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Correct Option: C
Explanation:
Orlon is polyacrylonitrile. The monomer acrylonitrile is $CH _2=CHCN$.
Hence, option C is correct.

Which polymer among the following polymers does NOT soften on heating?

chemistry polymer polymers of commercial importance some commercially important polymers condensation polymers

  1. Bakelite

  2. Polythene

  3. Polystyrene

  4. PVC

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Correct Option: A
Explanation:
Thermoplastics:
A plastic material, which can be repeatedly melted-molded again and again by simple heating, is called a thermoplastic. Thermoplastics become soft and moldable on heating. They can then be recast in different shapes and cooled. On cooling the thermoplastic material hardens.

Polyethylene, polystyrene and PVC are examples.

Thermosetting plastics:
A plastic material, which cannot be repeatedly melted-molded again, is called a thermosetting plastic.thermosetting plastics do not become soft on heating and they do not change their shape on heating.
Bakelite is one example of a thermosetting plastic.