What this tests
Syllabus point 6.1 — Physical and chemical changes, in Chemical reactions. Difficulty medium (estimated from the question's demands, not a Cambridge rating).
Also set in
The same question, as Cambridge printed it in other papers.
Cambridge IGCSE Chemistry 0620 · 6.1 Physical and chemical changes
June 2021 · Paper 22 · Question 14
One real Cambridge question from Chemical reactions, with the official answer. Cambridge has printed this question 4 times.