Answer: A large molecule made of repeating smaller units.
- A A large molecule made of repeating smaller units
- B A single small molecule with little repeating structural motif
- C A compound formed mainly from metallic lattice bonding
- D A compound held together largely by ionic attraction
Correct answer: A. A large molecule made of repeating smaller units
Explanation: Polymers are macromolecules composed of many repeating monomer units linked by covalent bonds.
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.