IB Chemistry HL 2.2.12 Benzene Resonance Question Bank
Practise IB Chemistry HL 2.2.12 by explaining benzene’s delocalized structure, bond evidence and preference for substitution.
- Syllabus
- First assessment 2025
- Course
- Chemistry HL
- Level
- HL
Exam points
- use equal intermediate C–C bond lengths and physical evidence to reject alternating localized single and double bonds
- describe benzene as a planar ring with six delocalized π electrons and equivalent C–C bonds
- explain why benzene favors electrophilic substitution and gains stability by preserving the delocalized aromatic system
2.2.12 (HL)—Benzene (C₆H₆) question 1
[Maximum number: 2]
Benzene is an aromatic hydrocarbon.
Discuss the physical evidence for the structure of benzene.
Any two of: planar «X-ray»
C to C bond lengths all equal
OR
C to C bonds intermediate in length between C-C and C=C
all C-C-C bond angles equal
2 max
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