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  • Phenol and formaldehyde undergo condensation to give a polymer The answer is the option (i). which on heating with formaldehyde gives a thermosetting polymer The answer is the option.

Phenol and formaldehyde undergo condensation to give a polymar (A) which on heating with formaldehyde gives a thermosetting polymer (B). Name the polymers. Write the reactions involved in the formation of (A). What is the structural difference between two polymers?

Answers (1)

Polymer ‘A’ in the question is Novalac and ‘B’ is bakelite. The reactions involved are:

The main structural difference between them is that novolac is a linear chain polymer while bakelite is a cross-linked polymer.

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