Karnataka Board PUCPUC Science 2nd PUC Class 12

Write the Names and Structures of the Monomers of the Following Polymers: Buna-n - Chemistry


Write the names and structures of the monomers of the following polymers: Buna-N

Write the names of monomers used for getting the following polymers:



Solution 1

The monomer units of Buna-N are 1, 3-butadiene and acrylonitrile.

N CH2=CH–CH=CH2           n CH2=CH=CN

1, 3-Butadiene                      Acrylonitrile

Solution 2

The monomers for Buna-N are 1,3-butadiene and acrylonitrile.

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Chapter 15: Polymers - Exercises [Page 437]


NCERT Chemistry Class 12
Chapter 15 Polymers
Exercises | Q 17.2 | Page 437


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

Explain the difference between Buna-N and Buna-S

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

How do you explain the functionality of a monomer?

Define the term polymerisation.

Is (-NH - CHR - CO-)n a homopolymer or copolymer?

Write the name and structure of one of the common initiators used in free radical addition polymerisation.

Write the names and structures of the monomers of the following polymers: Buna-S

Write the names and structures of the monomers of the following polymers: Dacron 


Shyam went to a grocery shop to purchase some food items. The shopkeeper packed all the items in polythene bags and gave them to Shyam. But Shyam refused to accept the polythene bags and asked the shopkeeper to pack the items in paper bags. He informed the shopkeeper about the heavy penalty imposed by the government for using polythene bags. The shopkeeper promised that he would use paper bags in future in place of polythene bags.

1) Write the values (at least two) shown by Shyam.

2) Write one structural difference between low-density polyethene and high-density polyethene.

3) Why did Shyam refuse to accept the items in polythene bags?

4) What is a biodegradable polymer? Give an example.


Which of the following polymers are condensation polymers?

(i) Bakelite

(ii) Teflon

(iii) Butyl rubber

(iv) Melamine formaldehyde resin

In addition polymer monomer used is

High density polyethylene (HDPE) can be prepared from ethylene by

A condensation polymer among the following polymers is:


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