MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils
Which is the monomer used to make PVC?
Think it through first, then pick an option.
- a CH₂ = CH₂
- b CH₂ = CHCl
- c CH ≡ CH
- d CH₂ = CCl₂
Answer and explanation
Correct answer: b CH₂ = CHCl
According to the book, vinyl chloride (CH₂=CHCl) gives polyvinyl chloride, PVC.
Why the other options are wrong
- a CH₂ = CH₂: CH₂=CH₂ (ethene) is polythene's monomer; PVC's is vinyl chloride, CH₂=CHCl.
- c CH ≡ CH: Ethyne is an alkyne with no Cl; PVC's monomer carries one Cl.
- d CH₂ = CCl₂: This has two Cl; PVC's monomer vinyl chloride has one, CH₂=CHCl.
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