Tag: polymer

Quizzes (7) Questions (194)

Questions Related to polymer

Multiple choice chemistry manmade materials synthetic rubber rubber polymer

Which of the following is not a synthetic rubber?

  1. Neoprene

  2. Buna-N rubber

  3. Buna-S rubber

  4. Polyethylene
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Neoprene, Buna-N, and Buna-S are all types of synthetic rubbers. Polyethylene is a plastic (thermoplastic polymer), not a synthetic rubber.

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Formation of nylons and polyesters are called step growth polymerization because:

  1. the polymers are formed by adding a monomer step by step

  2. the polymers are formed by condensation and monomers are joined by loss of simple molecules like water

  3. the monomers used for condensation are unsaturated molecules

  4. the polymers are formed by addition of a large number of free radicals formed by monomers
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
 These polycondensation reactions result in the loss of some simple molecules as water, alcohol, etc., and lead to the formation of high molecular mass condensation polymers.
let's look at the formation of nylon polymer
Nylon 6,6- It is prepared by the condensation polymerisation of hexamethylenediamine with adipic acid under high pressure and at high temperature with the removal of water molecules.
the correct option is [B].
Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Terylene is a condensation polymer of ethylene glycol and:

  1. benzoic acid

  2. phthalic acid

  3. terephthalic acid

  4. salicylic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Terylene is a condensation polymer of ethylene glycol and terephthalic acid,

it is the product of condensation polymerisation, this type of polymerisation generally involves a repetitive condensation reaction between two bi-functional monomers and lead to the formation of high molecular mass condensation polymers.
The correct option is [C].

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Which of the following is not true about polymers?

  1. Polymers are high molecular mass macro-molecules.

  2. Polymers may be of natural or synthetic origin.

  3. Condensation polymers are made up of one type of monomers only.

  4. They have high viscosity and do not carry any charge.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A) Polymers are high molecular mass macro-molecules made with a large number of repeating subunits.

B) Naturally occurring polymers - Silk, Wool, DNA, etc.
Synthetic polymers- Nylon, Polyethylene, Polyester etc. 
C) Two bi-functional monomers are used in condensation polymerisation,
Example Nylon-6,6 is the polymer of Hexamethylenediamine + adipic acid

So this statement is false.

D) Polymers are large chain molecules so they have high viscosity. Since monomers of polymers are neutral, the overall polymer is also neutral.

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

 Which of the following is condensation polymer? 

  1. Polypropylene

  2. PMMA

  3. Glyptal

  4. Teflon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Glyptal is a polyester formed by the condensation polymerization of ethylene glycol and phthalic acid, involving the elimination of small molecules like water. Polypropylene, PMMA, and Teflon are addition polymers formed from alkene monomers.

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Synthetic fiber does not obtained from renewable resources is : 

  1. Nylon

  2. Polyester

  3. Rayon

  4. Acrylic
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Synthetic fibres are manufactured using plant materials and minerals. 


Viscose comes from pine trees or petrochemicals, while acrylic, nylon and polyester come from oil and coal. 

Viscose fibre is obtained from the cellulose; versatility allows imitating materials such as cotton or silk.

Rayon is a manufactured fiber made from natural sources such as wood and agricultural products that are regenerated as cellulose fiber. 

The many types and grades of rayon can imitate the feel and texture of natural fibers such as silk, wool, cotton, and linen.

Therefore, option C is correct.

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Regenerated fibres have superior physical properties because

  1. they are fresh fibres

  2. they are obtained naturally

  3. they are chemically treated fibres

  4. None of the abvoe
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Regenerated fibre is created by dissolving the cellulose area of plant fibre in chemicals and making it into fibre  again.It consists of cellulose like cotton and hemp  so it is called as regenerated cellulose fibre.

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Bakelite is formed by:

  1. polymerization of phenol and formaldehyde

  2. polymerization of alcohol and acetaldehyde

  3. condensation of phenol and formaldehyde

  4. condensation of phenol and acetaldehyde
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bakelite is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde.


Hence, option C is correct.

Multiple choice types of polymerisation reactions condensation polymerisation polymer polymers chemistry

Which of the following monomers are unsuitable for condensation polymerization?

  1. hydroxy acids

  2. butane-dioic acid and glycol

  3. diamines and dicarboxylic acids

  4. propanoic acid and ethanol
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Propanoic acid and ethanol, both are monofunctional monomers $ CH _3-CH _2- OH , CH _3-CH _2COOH$ which are not suitable for a polycondensation reaction to take place because once they combine by condensation polemerisation further polymerisation is not possible.