Ethene, C2H4\text{C}_2\text{H}_4C2H4, reacts with water vapour. Which statement about the product is correct?
It has the formula C2H6O\text{C}_2\text{H}_6\text{O}C2H6O and contains a hydroxyl group
It has the formula C2H4O\text{C}_2\text{H}_4\text{O}C2H4O and contains a carboxyl group
It has the formula C2H6\text{C}_2\text{H}_6C2H6 and contains only single bonds
It has the formula C2H4O2\text{C}_2\text{H}_4\text{O}_2C2H4O2 and contains a carboxyl group
40 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.