Answer: Spatial arrangement of pendant groups along the chain.
- A Spatial arrangement of pendant groups along the chain
- B The statistical distribution of molecular weights across all chains
- C The degree of cross-linking between adjacent polymer chains
- D The rate at which monomer units are consumed during synthesis
Correct answer: A. Spatial arrangement of pendant groups along the chain
Explanation: Tacticity describes the regularity of substituent placement: isotactic (all same side), syndiotactic (alternating), atactic (random).
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.