A-LevelChemistryChemical periodicity9701/12 · Feb/Mar 2025 · Q201 Mark

J is either MgCl2 or AlCl3. K is either SiO2 or SiCl4. J(aq) add drops of aqueous sodium hydroxide -> white precipitate -> add an excess of aqueous sodium hydroxide -> precipitate dissolves K add water -> misty white fumes and a white precipitate in a solution with pH less than 7 Which row is correct?

AAlCl3 SiCl4

BAlCl3 SiO2

CMgCl2 SiCl4

DMgCl2 SiO2

✓ Correct answer

A: AlCl3 SiCl4

Oracle Prep sorts past-paper questions by topic, so you can drill Chemical periodicity and see which topics are most likely to come up next.

Topic: Chemical periodicity, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2025 Paper 1 Variant 2, question 20.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

Consecutive elements X, Y and Z are in Period 3 of the Periodic Table. Element Y has the highest first ionisation ene…

When dealing with a spillage of metallic sodium it is important that no toxic or flammable products are formed. Which…

Three test-tubes, X, Y, and Z, each contain a small amount of water. • A small amount of NaCl is added to test-tube X…

In an experiment, 0.600 mol of chlorine gas, Cl₂, is reacted with an excess of hot aqueous sodium hydroxide. One of t…

Z is an anhydrous compound of a Group 2 element. When it is heated, Z undergoes thermal decomposition to produce two …

Methylamine, CH₃NH₂, has very similar chemical properties to ammonia, NH₃. Methylamine reacts with hydrogen chloride …