Free NCERT Solutions For Class 12 Chemistry Chapter 15 : Polymers Free PDF Download

Question 1:
Explain the terms polymer and monomer

Question 2:
What are natural and synthetic polymers? Give two examples of each type.

Question 3:
Distinguish between the terms homopolymer and copolymer and give an example of each.

Question 7:
In which classes, the polymers are classified on the basis of molecular forces?

Question 8:
How can you differentiate between addition and condensation polymerisation?

Question 9:
Explain the term copolymerization and give two examples.

Question 10:
Write the free radical mechanism for the polymerization of ethene.

solution 10:

Question 11:
Define thermoplastics and thermosetting polymers with two examples of each.

Question 12:
Write the monomers used for getting the following polymers.
(i) Polyvinyl chloride
(ii) Teflon
(iii) Bakelite

Question 14:
How does the presence of double bonds in rubber molecules influence their structure and reactivity?

Question 15:
Discuss the main purpose of vulcanization of rubber.

Question 16:
What are the monomeric repeating units of Nylon-6 and Nylon-6, 6?

Question 18:
Identify the monomer in the following polymeric structures

Question 19:
How is dacron obtained from ethylene glycol and terephthalic acid?

Solution 19:

INTEXT SOLUTION

Question 1:
What are polymers’?

Question 2:
How are polymers classified on the basis of structure?

Question 3:
Write the names of monomers of the following polymers:

Question 4:
Classify the following as addition and condensation polymers: Terylene, Bakelite, Polyvinyl chloride, Polythene.

Question 5:
Explain the difference between Buna-N and Buna-S.

Question 6:
Arrange the following polymers in increasing order of their intermolecular forces.
(i) Nylon 6, 6, Buna-S, Polythene.
(ii) Nylon 6, Neoprene, Polyvinyl chloride.