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Describe the test for carbon dioxide gas and give the observation for a positive result.
See it on the paper →Describe the test for carbon dioxide gas and include the observation for a positive result. test
See it on the paper →Molecule Y reacts with sodium carbonate. Carbon dioxide is made in the reaction. State the test for carbon dioxide. Include the observation for a positive result. test
See it on the paper →Describe the chemical test for hydrogen gas. State the observation for a positive result. test observation
See it on the paper →Which test result identifies the gas?
See it on the paper →What is the gas?
See it on the paper →State the test for hydrogen gas and give the observation for a positive result. test
See it on the paper →What reacts with ammonia gas?
See it on the paper →This question was answered well. Very occasionally candidates gave the test for oxygen instead.
— Examiner report, May/June 2025, 0654/42 Q6(d) (Cambridge)
Very few candidates knew the chemical test for hydrogen gas.
— Examiner report, October/November 2022, 0654/33 Q8(c)(iii) (Cambridge)
This question was generally well answered. Some candidates muddled the test for oxygen gas with the test for hydrogen gas. Some candidates referred to the sound made as pop up rather than a pop or a squeaky pop.
— Examiner report, February/March 2022, 0654/42 Q8(d)(ii) (Cambridge)
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State the chemical test for carbon dioxide gas and the observation for a positive result. test observation
A student wants to distinguish between mixture L and mixture M. Describe a test he can do. Include the results in each case. test result with L
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