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IB Chemistry HL 2.2.15 Sigma and Pi Bonding Question Bank

Describe orbital overlap in sigma and pi bonds, then count each bond type in alkenes, alkynes and molecules such as HCN.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • distinguish end-on sigma overlap from side-on pi overlap
  • count sigma and pi bonds in single, double and triple bonds
  • relate hybrid orbitals and unhybridized p orbitals to multiple-bond formation

2.2.15 (HL)—Sigma (σ) and pi (π) bonds question 1

[Maximum number: 2]

Describe the formation of σ\sigma and π\pi bonds in an alkene.

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