◈ Oracle PrepSign Up Free
O-LevelChemistryAcids, Bases & Salts5070/11 · Oct/Nov 2022 · Q31 Mark

An aqueous solution contains a salt, Y. Addition of an aqueous solution X results in a precipitate being formed that redissolves when more X is added. What could solution X and salt Y be?

AHCl(aq) AgNO3
BH2SO4(aq) Ba(NO3)2
CNaOH(aq) CuSO4
DNaOH(aq) ZnSO4

✓ Correct answer

D: NaOH(aq) ZnSO4

Practise more questions on this topic

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.

Sign up free →

About this question

Topic
Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2022 Paper 1 Variant 1, question 3.

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

Related Chemistry questions

Acids, Bases & SaltsMay/June 20101m

Which is an anion that is present in the solution formed when an excess of dilute hydrochloric acid is added to calci…

Acids, Bases & SaltsMay/June 20101m

The diagram shows a simple laboratory apparatus for the preparation and collection of a dry gas. What is the gas?

Acids, Bases & SaltsMay/June 20101m

Which reaction does not involve either oxidation or reduction?

Organic ChemistryMay/June 20121m

Which of the following is a type of naturally occurring polymer?

Organic ChemistryMay/June 20121m

Compound Q reacts with bromine to form the compound shown. Which is compound Q?

Bonding & StructureMay/June 20131m

In which method of separation are Rf values used?

← Browse all past-paper questions

© 2026 Oracle Prep