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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: 3-Hydroxybutanoic acid

Solution

The correct option is 3-Hydroxybutanoic acid because it is a key monomer used in the synthesis of Novolac resins, which are phenolic thermosetting plastics. This compound contributes to the structure and properties of the final polymer.

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