Answer: Polythene and Nylon-6,6.
- A Polythene and Nylon-6,6
- B Nylon-6,6 and Polythene
- C Bakelite and Terylene
- D PVC and Polythene
Correct answer: A. Polythene and Nylon-6,6
Explanation: Polythene forms by addition polymerisation of ethene, while Nylon-6,6 forms by condensation with loss of water. So the order addition-then-condensation is Polythene, Nylon-6,6.
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.