Lesson 4.8.3.2
4.8.3.2 Metal hydroxides Quiz: AQA Chemistry, Unit 8
20 questions
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Lesson 4.8.3.2, Metal hydroxides: 20 multiple choice questions for the AQA GCSE Chemistry (8462), Unit 8: Chemical analysis, written with Revision Ninja.
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The 20 questions
-
Which reagent identifies some metal ions by forming coloured or white precipitates?
- Limewater
- Sodium hydroxide solution
- Barium chloride solution
- Silver nitrate solution
-
What colour precipitate forms with aluminium, calcium and magnesium ions and sodium hydroxide?
- Green
- Blue
- Brown
- White
-
Which hydroxide dissolves in excess sodium hydroxide solution?
- Magnesium hydroxide
- Aluminium hydroxide
- Calcium hydroxide
- Copper(II) hydroxide
-
What colour is the copper(II) hydroxide precipitate?
- Brown
- Green
- White
- Blue
-
What colour is the iron(II) hydroxide precipitate?
- Green
- Brown
- Blue
- White
-
What colour is the iron(III) hydroxide precipitate?
- Green
- Brown
- Yellow
- Blue
-
Which metal ion forms a blue precipitate with sodium hydroxide?
- Magnesium
- Iron(III)
- Iron(II)
- Copper(II)
-
Which ions form white precipitates that do NOT dissolve in excess sodium hydroxide?
- Aluminium and calcium
- Iron(II) and iron(III)
- Copper and iron
- Calcium and magnesium
-
A solution forms a green precipitate with sodium hydroxide. Which ion is most likely?
- Aluminium
- Copper(II)
- Iron(III)
- Iron(II)
-
A white precipitate forms with sodium hydroxide and then dissolves in excess. Which ion is present?
- Calcium
- Magnesium
- Aluminium
- Copper(II)
-
What colour precipitate forms when sodium hydroxide reacts with copper(II) ions?
- Blue precipitate
- Brown precipitate
- White precipitate
- Green precipitate
-
Which equation shows formation of magnesium hydroxide?
- Mg2+ + OH- -> MgOH
- Mg2+ + 2OH- -> Mg(OH)2
- Mg + 2OH- -> Mg(OH)2
- Mg2+ + 2OH- -> Mg2(OH)
-
What is observed when excess sodium hydroxide is added to magnesium ions?
- Solution turns blue
- Precipitate dissolves
- No change
- White precipitate remains
-
Which observation shows copper(II) ions are present in a mixed sample with sodium hydroxide?
- A blue precipitate
- A green precipitate
- A white precipitate
- A brown precipitate
-
Which ion forms a precipitate that dissolves in excess, helping distinguish it from calcium?
- Copper(II)
- Aluminium
- Iron(II)
- Magnesium
-
Which equation shows formation of iron(II) hydroxide?
- Fe2+ + 2OH- -> Fe(OH)2
- Fe2+ + OH- -> FeOH
- Fe2+ + 2OH- -> Fe2(OH)
- Fe + OH- -> Fe(OH)2
-
Which metal hydroxide precipitate dissolves in excess sodium hydroxide solution?
- Magnesium hydroxide
- Aluminium hydroxide
- Copper(II) hydroxide
- Calcium hydroxide
-
A sample contains both aluminium and magnesium ions. What is observed after excess sodium hydroxide is added?
- A white precipitate remains
- A blue precipitate forms
- No precipitate forms
- All precipitate dissolves
-
What colour precipitate is formed by iron(III) ions with sodium hydroxide?
- White
- Brown
- Blue
- Green
-
Which equation shows calcium hydroxide being formed?
- Ca2+ + 2OH- -> Ca2(OH)
- Ca2+ + 2OH- -> Ca(OH)2
- Ca + 2OH- -> Ca(OH)2
- Ca2+ + OH- -> CaOH
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