Answer: Methyl methacrylate.
- A Methyl acrylate
- B Methyl methacrylate
- C Vinyl acetate
- D Acrylonitrile
Correct answer: B. Methyl methacrylate
Explanation: PMMA (poly methyl methacrylate) is the addition polymer of methyl methacrylate, valued for its transparency and use as an unbreakable glass substitute.
Addition polymerisation simply links monomers containing a double bond with nothing left over, while condensation polymerisation joins two different monomers through a reaction (often forming an ester or amide bond) that releases a small molecule like water at each step.
Concept context
Large molecules made of repeating monomer units. Covers addition and condensation polymerisation, natural and synthetic polymers (nylon, PVC, Bakelite, natural rubber), and their real-world industrial applications.