What is the chemical test for hydrogen gas?
Ignites with a squeaky pop.
Limewater turns cloudy.
Relights a glowing splint.
Bleaches damp litmus paper.
Practise OCR GCSE Chemistry Identifying the products of chemical reactions with exam-style questions for Foundation and Higher tier. 46 questions, matched to the OCR GCSE Chemistry (J248) specification and written in Paper 1 and Paper 2 (Foundation Tier) or Paper 3 and Paper 4 (Higher Tier) style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.