Lesson 3.2.6

3.2.6 Reactions of ions in aqueous solution Quiz: AQA Chemistry, Unit 2

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

In partnership with Revision Ninja

Lesson 3.2.6, Reactions of ions in aqueous solution: 20 multiple choice questions for the AQA Chemistry (7405), Unit 2: Inorganic chemistry, written with Revision Ninja.

Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.

Host this setFree Play

The 20 questions

  1. Which metal-aqua ions are formed in aqueous solution for Fe and Cu in the 2+ state?

    • [Fe(OH)6]2+ and [Cu(OH)6]2+
    • [Fe(H2O)4]2+ and [Cu(H2O)4]2+
    • [Fe(H2O)6]3+ and [Cu(H2O)6]3+
    • [Fe(H2O)6]2+ and [Cu(H2O)6]2+

  2. Which metal-aqua ion is formed by aluminium in aqueous solution?

    • [Al(H2O)6]2+
    • [Al(H2O)6]3+
    • [Al(H2O)4]3+
    • [Al(OH)6]3-

  3. Which hexaaqua ion forms a more acidic solution in water?

    • [Mg(H2O)6]2+ setup
    • [Cu(H2O)6]2+ setup
    • [Fe(H2O)6]3 setup
    • [Fe(H2O)6]2+ setup

  4. What property of Al3+ makes [Al(H2O)6]3+ more acidic than 2+ aqua ions?

    • Larger ionic radius
    • Lower charge density
    • Higher charge density
    • Lower electronegativity

  5. Which metal hydroxide is amphoteric?

    • Ca(OH)2
    • NaOH
    • Al(OH)3
    • Mg(OH)2

  6. What is observed when sodium hydroxide solution is added to aqueous iron(II) ions?

    • Green precipitate
    • Blue precipitate
    • Brown precipitate
    • White precipitate

  7. What is observed when aqueous sodium hydroxide is added to aqueous iron(III) ions?

    • Red-brown precipitate
    • White precipitate
    • Green precipitate
    • Pale blue precipitate

  8. What is observed when aqueous sodium hydroxide is added to aqueous copper(II) ions?

    • White precipitate
    • Pale blue precipitate
    • Green precipitate
    • Red-brown precipitate

  9. What is observed when excess aqueous sodium hydroxide is added to aqueous aluminium ions?

    • Red-brown precipitate forms
    • Green precipitate forms
    • White precipitate dissolves
    • White precipitate remains

  10. Which ion is formed when aluminium hydroxide dissolves in excess NaOH?

    • [Al(H2O)6]3+
    • Al3+
    • [Al(OH)4]-
    • AlO2^3+

  11. What is observed when aqueous sodium carbonate is added to aqueous aluminium ions?

    • White precipitate, effervescence
    • White precipitate only
    • Red-brown precipitate only
    • Green precipitate, effervescence

  12. What is observed when aqueous sodium carbonate is added to aqueous iron(II) ions?

    • Green precipitate, effervescence
    • Red-brown precipitate
    • White precipitate
    • Green precipitate

  13. What is formed when excess aqueous ammonia is added to aqueous copper(II) ions?

    • Yellow solution
    • Pale blue precipitate
    • Green solution
    • Deep blue solution

  14. Which gas is evolved when aqueous sodium carbonate reacts with iron(III) ions?

    • Carbon dioxide
    • Hydrogen
    • Oxygen
    • Ammonia

  15. Which precipitate forms initially when aqueous sodium hydroxide is added to aluminium ions?

    • Green precipitate
    • White precipitate
    • Pale blue precipitate
    • Red-brown precipitate

  16. Which of these metal ions gives a green precipitate with NaOH(aq)?

    • Al3+
    • Fe2+
    • Cu2+
    • Fe3+

  17. Which equation represents the reaction of Al(OH)3 with excess NaOH?

    • Al(OH)3 + H+ -> [Al(OH)2]+ + H2O
    • Al(OH)3 + Na+ -> NaAl(OH)3
    • Al(OH)3 + OH- -> [Al(OH)4]-
    • Al(OH)3 + 3OH- -> Al3+ + 3H2O

  18. Which reagent gives a deep blue solution in excess when added to Cu2+(aq)?

    • Dilute HCl(aq)
    • NaCl(aq)
    • NH3(aq)
    • Na2CO3(aq)

  19. What is observed when aqueous sodium carbonate is added to aqueous iron(III) ions?

    • Green precipitate, effervescence
    • Red-brown precipitate, effervescence
    • White precipitate, effervescence
    • Red-brown precipitate only

  20. Which reagent distinguishes Fe2+ from Fe3+ in aqueous solution by the colour of the precipitate?

    • H2SO4(aq)
    • NaOH(aq)
    • AgNO3(aq)
    • Br2(aq)

All AQA Chemistry quizzes