CAIE IGCSE Chemistry 12.5.3 Gas Tests Nh3 with Damp Red Litmus Questions
Work through real CAIE IGCSE Chemistry questions to identify gases from litmus, limewater, splint and manganate observations.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- test ammonia with damp red litmus paper, which turns blue
- test carbon dioxide with limewater, which turns milky
- test chlorine with damp litmus, which is bleached, and hydrogen with a lighted splint, which gives a pop
- test oxygen with a glowing splint that relights and sulfur dioxide with acidified potassium manganate(VII), which decolourises
