Case study·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A laboratory note says: "Molecule P has equal bonds intermediate between single and double bonds. Molecule Q has polar bonds but no net dipole moment."
Total: 5 marks
(a) What bonding idea explains the equal intermediate bonds in P? (2 marks)
(b) What geometrical idea can explain zero dipole in Q? (2 marks)
(c) Give one example of Q. (1 mark)
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