alleryWhich monomer is repeatedly joined to form the polymer polyethylene?
AStyrene
BEthylene
CTetrafluoroethylene
DVinyl chloride
Answer & Solution
Correct answer: B. Ethylene
1. Polymerisation joins alkene-type monomers into a long chain.
2. Polyethylene is built by repeating one monomer many times.
3. That monomer is ethylene (CH2=CH2).
4. Rule out D: vinyl chloride is the monomer of PVC, not polyethylene.
5. Rule out A: styrene is the monomer of polystyrene (thermocol).
6. Rule out C: tetrafluoroethylene is the monomer of Teflon.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 9 "Carbon Compounds", p.141_
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