GCSE Chemistry C3 - All the Topic 1 'Qualitative Analysis' test

1. If copper ions are present, what will you see when NaOH is added?

  • A white suspension
  • A light blue precipitate
  • A dark green precipitate
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2. Which colour precipitate will iron (II) produce when NaOH is added?

  • A white suspension
  • A dark green precipitate
  • A brown precipitate

3. Blue litmus paper turns red in ______

  • Acids
  • Bases

4. What is the test for ammonium ions?

  • Add phenolphthalein and it will turn pink if ions are present
  • Gently heat the test tube and test the gas given off with moist red litmus paper. It should go blue.
  • Add methyl orange and it will go colourless if ions are present

5. What colour flame do copper ions produce?

  • Green
  • Blue
  • Brown - orange

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