Answer: Branched chain structure.
- A Branched chain structure
- B Linear chain structure
- C Cross-linked structure
- D Ring structure
Correct answer: A. Branched chain structure
Explanation: LDPE has many branches due to free-radical polymerisation, leading to lower density and flexibility.
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.