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Which of the following statements is not true ? [JEE-Main On line-2018]

1. Chain growth polymerisation involves homopoly-merisation only
2. Chain growth polymerisation includes both homo-polymerisation and copolymerization
3. Nylon 6 is an example of step-growth polymerisation
4. Step growth polymerization requires a bifunctional monomer

Correct answer: Chain growth polymerisation involves homopoly-merisation only

Solution

The statement that is NOT true is 'Chain growth polymerisation involves homopolymerisation only.' Chain-growth polymerisation can be either homopolymerisation or copolymerisation (e.g. SBR). Nylon-6 is step-growth and step-growth needs bifunctional monomers, so those statements are true.

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