What this tests
Syllabus point 12.5 — Identification of ions and gases, in Experimental techniques and chemical analysis. Difficulty medium (estimated from the question's demands, not a Cambridge rating).
Cambridge IGCSE Chemistry 0620 · 12.5 Identification of ions and gases
November 2020 · Paper 22 · Question 32
One real Cambridge question from Experimental techniques and chemical analysis, with the official answer.