May/June 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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39Structural Geometric IsomerismEasy1 mark
Structural isomerism and stereoisomerism should be considered when answering this question. How many isomeric hydrocarbon molecules:
  • are non-cyclic
  • contain exactly four carbon atoms
  • contain two sp hybridised carbon atoms
  • contain two sp hybridised carbon atoms?