9701/22 · May/June 2025
AS Level Structured Questions · 60 marks · 5 questions
- Question 116 marks
Giant covalent structures of diamond and graphite and their conductivity, and how the chlorides of phosphorus and silicon react with water.
- Question 210 marks
Relative atomic mass from isotopic abundances, electrons in the 3d subshell of an iron(II) ion, and the shape of orbitals.
- Question 316 marks
Mechanism of HBr addition to propene and why the secondary carbocation wins, then reading rates from a concentration-time graph for hydrogenation.
- Question 413 marks
Reducing a carboxylic acid to an alcohol, then a three-step route through a chloroalkane and a nitrile to a new acid.
- Question 55 marks
Empirical formula of vitamin C and an iodine titration to find how much vitamin C a lemon contains.