Which of the following chemical formulae represents a hydrocarbon?
CH3CH2COOH\text{CH}_3\text{CH}_2\text{COOH}CH3CH2COOH
CH3CH2CH2Cl\text{CH}_3\text{CH}_2\text{CH}_2\text{Cl}CH3CH2CH2Cl
CH3CH2CH=CH2\text{CH}_3\text{CH}_2\text{CH}=\text{CH}_2CH3CH2CH=CH2
CH3CH2NH2\text{CH}_3\text{CH}_2\text{NH}_2CH3CH2NH2
Practise Edexcel GCSE Chemistry Fuels with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.