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Monomer of Novolac is: (1) 3-Hydroxybutanoic acid (2) phenol and melamine (3) o-Hydroxymethylphenol (4) 1,3-Butadiene and styrene

1. 3-Hydroxybutanoic acid
2. phenol and melamine
3. o-Hydroxymethylphenol
4. 1,3-Butadiene and styrene

Correct answer: o-Hydroxymethylphenol

Solution

Novolac is a phenol-formaldehyde resin formed under acidic conditions; its monomeric intermediate is o-hydroxymethylphenol, which condenses to give the linear polymer. 3-Hydroxybutanoic acid is the monomer of PHB, not Novolac.

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