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Acids, bases and salts · Cambridge IGCSE 0620

7.4 Identification of ions and gases

7.4 Identification of ions and gases appeared in 6 of the 6 years from 2020–2025, worth 1915 marks across 280 questions — about 6.84 marks each.

Based on 248 real Cambridge past papers, 2020–2025.

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Questions per year

How many Chemistry questions tagged to this topic appeared each year.

  • 202043
  • 202152
  • 202248
  • 202347
  • 202446
  • 202544

Appearance history

Most recent
2025
First in range
2020
Years since last
0
Longest gap
0 years

Historical occurrence only — not an exam prediction.

Related topics

Topics that most often share a question with this one.

12.5 Chemical tests and qualitative analysis 7.1 Characteristic properties of acids and bases 10.3 Air quality and climate 2.2 Atomic structure and the Periodic Table 2.4 Ions and ionic bonds

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