Synthetic rubbers, such as polybutadiene, are manufactured from monomers that are unsaturated hydrocarbons containing two carbon-carbon double bonds (C=C\text{C}=\text{C}C=C), known as alkadienes.
Which of the following represents the general formula for a non-cyclic alkadiene containing n n\,n carbon atoms?
CnH2n\text{C}_n\text{H}_{2n}CnH2n
CnH2n+2\text{C}_n\text{H}_{2n+2}CnH2n+2
CnH2n−2\text{C}_n\text{H}_{2n-2}CnH2n−2
CnH2n−4\text{C}_n\text{H}_{2n-4}CnH2n−4
Practise Edexcel GCSE Chemistry Hydrocarbons with exam-style questions for Foundation and Higher tier. 34 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.
