What is the formula of the functional group in carboxylic acids?
−OH-\mathrm{OH}−OH
−CH3-\mathrm{CH}_3−CH3
−COOH-\mathrm{COOH}−COOH
−CO2-\mathrm{CO}_2−CO2
83 exam-style questions on OCR GCSE Chemistry Organic chemistry. Each one has a worked solution and a mark scheme showing where the marks go.