Two gases, two chemical tests
Two gases, two chemical tests
A chemical test must state both the method used and the observation that confirms the gas. Hydrogen is tested with a burning splint, while carbon dioxide is tested with limewater.
Step-by-step lessons on Edexcel GCSE Chemistry 4.1.5 Chemical tests for hydrogen and carbon dioxide. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.