O-LevelChemistryAcids, Bases & Salts5070/12 · Oct/Nov 2021 · Q51 Mark

When aqueous sodium hydroxide is added to aqueous compound X, a red-brown precipitate is formed. When dilute nitric acid followed by aqueous barium nitrate is added to aqueous compound X, a white precipitate is formed. What is X?

Achromium(III) sulfate

Bchromium(III) chloride

Ciron(III) chloride

Diron(III) sulfate

✓ Correct answer

D: iron(III) sulfate

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

Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2021 Paper 1 Variant 2, question 5.

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