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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pl240

The compound shown has both an amino group and a carboxylic acid group. It is heated to bring about polymerisation. Select all correct statements.

  1. ASelf-condensation gives a polyamide
  2. BThe product is a homopolymer because only one monomer is used
  3. CThe polymerisation is chain-growth, each molecule adding to a radical chain end
  4. DOne molecule of water is eliminated for each amide bond formed

Answer: A, B, D

6-Aminohexanoic acid self-condenses into nylon 6, a polyamide. Because only one monomer is used, it is a homopolymer even though it has two different functional groups. One molecule of water leaves for every new amide bond, whereas statement C is wrong because the growth is step-wise, not by active radical chain ends.
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