chemistry 12th class cbse notes


A polymer may be defined as a high molecular weight compound formed by the combination of a large number of one or more types of small molecular weight compounds.

The small unit(s) of which polymer is made is (are) known as a monomer.


The polymerization may be defined as a chemical combination of a number of similar or different molecules to form a single large molecule.

The transformation of ethene to polythene and interaction of hexamethylene diamine and adipic acid leading to the formation of Nylon 6, 6 are examples of two different types of polymerisation reactions.


A polymer which is obtained from only one type of monomer molecules is known as a homopolymer.

Example: polythene, PVC, PAN, Teflon, Buna rubber etc.

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