A student is given methanoic acid, magnesium carbonate, butanol, sodium, butene, bromine, ethene and hydrogen. The student mixes two of the substances. The mixture fizzes, and the gas produced turns limewater cloudy. Which two substances did the student mix?
Methanoic acid and magnesium carbonate
Butene and bromine
Butanol and sodium
Ethene and hydrogen
97 exam-style questions on AQA GCSE Chemistry 7.2 Reactions of alkenes and alcohols, covering 7.2.1 Structure and formulae of alkenes, 7.2.2 Reactions of alkenes, 7.2.3 Alcohols, 7.2.4a Carboxylic acids, and 7.2.4b Carboxylic acids as weak acids. Each one has a worked solution and a mark scheme showing where the marks go.