Experimental techniques and chemical analysis · Cambridge IGCSE 0653
C12.4 Identification of ions and gases
C12.4 Identification of ions and gases appeared in 6 of the 6 years from 2020–2025, worth 633 marks across 166 questions — about 3.81 marks each.
Based on 220 real Cambridge past papers, 2020–2025.
Questions per year
How many Combined Science questions tagged to this topic appeared each year.
- 202021
- 202138
- 202238
- 202336
- 202421
- 202512
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.
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