IB DP Chemistry Higher Level (2023 syllabus) · IB ib-chem-hl
S3 Structure 3: Classification of matter
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Structure 3: Classification of matter
- Explain why carboxylic acids are significantly more acidic than alcohols, despite both fun… (4 marks, Explain)
- Explain why the atomic radius of potassium is greater than that of both sodium and chlorin… (4 marks, Explain)
- Explain why the first ionisation energy of sulfur is lower than that of phosphorus, despit… (4 marks, Explain)
- Explain why the electron affinity (first) of chlorine is more exothermic than that of fluo… (4 marks, Explain)
- Explain why the successive ionisation energies of aluminium show two large increases: one … (4 marks, Explain)
- Explain why the first ionisation energy of magnesium is greater than that of both sodium a… (4 marks, Explain)
- Explain how the presence of both a hydroxyl group and a carbonyl group within the same mol… (4 marks, Explain)
- Explain why amides have significantly higher boiling points than amines of similar molar m… (4 marks, Explain)
- Explain why esters generally have lower boiling points than carboxylic acids of comparable… (4 marks, Explain)
- Explain why primary amines are weaker bases than ammonia, yet aniline (phenylamine) is a s… (4 marks, Explain)
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