Answer: Polymer made from two or more different monomers.
- A Polymer made from two or more different monomers
- B Polymer with mainly one type of monomer during normal conditions
- C A cross-linked polymer as generally observed
- D A biodegradable polymer in typical laboratory settings
Correct answer: A. Polymer made from two or more different monomers
Explanation: Copolymers are formed when two or more different monomers polymerise together, giving varied properties.
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.