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Polymer Chemistry

Description: Polymer Chemistry
Number of Questions: 15
Created by:
Tags: Polymer Chemistry Polymers
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Which of the following is not a condensation polymer?

  1. Melamine

  2. Glyptal

  3. Neoprene

  4. Dacron

  5. None of these

Show answer
Correct Option: C
Explanation:

Neoprene is an addition polymer.

The ratio of Mw and Mn for most of the synthetic polymer is

  1. more than 1

  2. less than 1

  3. equal to 1

  4. dependent upon the type of monomer

  5. none of the above

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Correct Option: A
Explanation:

For synthetic polymers, Mw (the weight average) is always larger than Mn (the number average), so it is always greater than 1.

Which of the following is not a natural polymer?

  1. Starch

  2. Cellulose

  3. Protein

  4. Nylon

  5. None of the above

Show answer
Correct Option: D
Explanation:

Nylon is an example of artificial polymer.

Which of the following is/are example(s) of polyester polymer?

  1. Terylene

  2. Melamine

  3. Nylon-66

  4. Bakelite

  5. All of the above

Show answer
Correct Option: A
Explanation:

Terylene is a polyester polymer.

Buna-S rubber is made up of

  1. isoprene and butadiene

  2. styrene and butadiene

  3. vinyl chloride and sulphur

  4. butadiene

  5. none of the above

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Correct Option: B
Explanation:

Buna-S rubber is made up of styrene and butadiene.

Which of the following is/are fully fluorinated polymer(s)?

  1. Teflon

  2. Thiokol

  3. PVC

  4. Neoprene

  5. All of the above

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Correct Option: A
Explanation:

Teflon is a fully fluorinated polymer.

Which of the following statements is/are false?

  1. Natural rubber is a 1, 4-polymer of isoprene.

  2. Buna-S is a copolymer of butadiene and styrene.

  3. Natural rubber has the trans-configuration at every double bond.

  4. In vulcanisation, the formation of sulphur bridges between different chains make rubber harder and stronger.

  5. All of the above

Show answer
Correct Option: C
Explanation:

Natural rubber has the cis-configuration at every double bond.

Nylon is not a ____________.

  1. homopolymer

  2. polyamide

  3. copolymer

  4. condensation polymer

  5. none of the above

Show answer
Correct Option: A
Explanation:

A homopolymer is a polymer, which is formed from only one type of monomer and is made up of 2 different monomers; a diamine and a dicarboxylic acid.

Polymer formation from monomers starts by _________.

  1. hydrolysis of monomers

  2. conversion of monomers to monomer ion by protons

  3. coordination reaction between monomers

  4. condensation reaction between monomers

  5. none of the above

Show answer
Correct Option: D
Explanation:

It is a correct answer. Polymer formation from monomers starts by condensation reaction between monomers.

Which pattern is not a copolymer?

  1. CCDDDCCDDDCCDDD

  2. AAAAAAAAAAAAAAA

  3. BBBBBBBBAAAAAAA

  4. CCCDDDCCCDDDCCC

  5. None of the above

Show answer
Correct Option: B
Explanation:

This is a homopolymer.

Which of the following instruments is used for measuring Visco-elastic properties?

  1. Good rich Flexometer

  2. Pico-abrader

  3. Rheovibron

  4. Fatigue to failure test

  5. None of these

Show answer
Correct Option: C
Explanation:

Rheovibron is used for measuring Visco-elastic properties.

Which of the following is not a characteristic of thermoplastic?

  1. It can be molded.

  2. There are no cross links between chains.

  3. It is resistant to heat.

  4. It is commonly used as plastic bottle.

  5. All of the above

Show answer
Correct Option: C
Explanation:

Thermoplastic polymers soften and melt on heating.

Plasticisers are added to synthetic plastics to _____________.

  1. impart flexibility

  2. develop new improved properties not present in the original resin

  3. improve workability during fabrication

  4. are able to permeate into the free volume around the polymer chains

  5. all of the above

Show answer
Correct Option: E
Explanation:

It is the correct answer. 

Which of the following is used as a substitute for human blood vessels in heart by-pass operation?

  1. PVC

  2. Polythene

  3. Teflon/dacron

  4. Polystyrene

  5. None of the above

Show answer
Correct Option: C
Explanation:

Teflon/dacron is good substitude for human blood vessels in heart by-pass operation.

Zeigler - Natta catalyst is used in the polymerisation of

  1. propylene

  2. styrene

  3. vinyl acetate

  4. vinyl chloride

  5. all of the above

Show answer
Correct Option: A
Explanation:

Zeigler - Natta catalyst is used in the polymerisation of propylene

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