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CAIE IGCSE Chemistry Flame Test Colours

CAIE IGCSE Chemistry Flame Test Colours
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise describing a clean flame-test method and identifying lithium, sodium, potassium, calcium, barium and copper ions from flame colours.

How this is tested

  • use a clean nichrome or platinum wire or a wooden splint and place the sample in a non-luminous flame
  • identify lithium as red, sodium as yellow and potassium as lilac from their flame colours
  • identify calcium as orange-red, barium as light green and copper as blue-green

Question 40

[Maximum number: 1]

A student carries out a flame test on a sample.
The flame colour observed is light green.
Which ion is present in the sample?

A

Ba2+\mathrm{Ba}^{2+}

B

Ca2+\mathrm{Ca}^{2+}

C

Li+\mathrm{Li}^{+}

D

K+\mathrm{K}^{+}