A gas does not relight a glowing splint and does not turn limewater milky. Which gas could it be?
It could only be oxygen gas.
It could only be carbon dioxide.
It could be nitrogen or oxygen.
It could be hydrogen or chlorine.
40 exam-style questions on AQA GCSE Chemistry 8.2 Identification of common gases, covering 8.2.1 Test for hydrogen, 8.2.2 Test for oxygen, 8.2.3 Test for carbon dioxide, and 8.2.4 Test for chlorine. Each one has a worked solution and a mark scheme showing where the marks go.