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Phenol and fomaldehyde undergo condensat...

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

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A' is novolac and 'B' is bakelite. For reactions involved ans structural differences.
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