Monomer on heating with formaldehyde forms infusible solid mass called .

bakelite

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melamine

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adipic acid

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nevolac

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Solution

The correct options are
A bakelite
D nevolac
Bakelite is kind of phenol- formaldehyde polymer. Reaction of phenol and formaldehyde gives initial product nevolac (linear), when it is treated with formaldehyde it gives bakelite.

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