Polymers TEXTBOOK Solution

Question 1.

What are polymers ?

Solution:

Polymers are high molecular mass substances consisting of large number of repeating structural units. They are also called as macromolecules. Some examples of polymers are polythene, bakelite, rubber, nylon 6, 6 etc.

Question 2.

How are polymers classified on the basis of structure?

Solution:

On the basis of structure, the polymers are classified as below :

  1. Linear polymers such as polythene, polyvinyl chloride, etc.
  2. Branched chain polymers such as low density polythene.
  3. Cross linked polymers such as bakelite, melamine, etc.

Question 3.

Write the names of monomers of the following polymers :

NCERT Solutions for Class 12 Chemistry Chapter 15 Polymers 1

Solution:

  1. Hexamethylene diamine and adipic acid
  2. Caprolactam
  3. Tetrafluoroethene

Question 4.

Classify the following as addition and condensation polymers : Terylene, Bakelite, Polyvinyl chloride, Polythene.

Solution:

Addition polymers : Polyvinyl chloride, Polythene.
Condensation polymer : Terylene, Bakelite.

Question 5.

Explain the difference between Buna-N and Buna-S.

Solution:

Buna-N is a copolymer of 1, 3-butadiene and acrylonitrile and Buna-S is a copolymer of 1, 3-butadiene and styrene.

Question 6.

Arrange the following polymers in increasing order of their intermolecular forces.

  1. Nylon 6,6, Buna-S, Polythene
  2. Nylon 6, Neoprene, Polyvinyl chloride.

Solution:

The increasing order of intermolecular forces is :

  1. Buna-S, Polythene, Nylon 6, 6
  2. Neoprene, Polyvinyl chloride, Nylon 6.

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