During the thermal cracking of one molecule of dodecane (C12H26\text{C}_{12}\text{H}_{26}C12H26), one molecule of butane (C4H10\text{C}_4\text{H}_{10}C4H10) and two molecules of a hydrocarbon Y Y\,Y are produced.
Which option correctly identifies the molecular formula of Y Y\,Y and its homologous series?
Molecular formula: C4H8\text{C}_4\text{H}_8C4H8; Homologous series: Alkene
Molecular formula: C4H10\text{C}_4\text{H}_{10}C4H10; Homologous series: Alkane
Molecular formula: C8H16\text{C}_8\text{H}_{16}C8H16; Homologous series: Alkene
Molecular formula: C4H8\text{C}_4\text{H}_8C4H8; Homologous series: Alkane
Practise AQA GCSE Chemistry Carbon compounds as fuels and feedstock with exam-style questions for Foundation and Higher tier. 13 questions covering Crude oil, hydrocarbons and alkanes, Fractional distillation and petrochemicals, Properties of hydrocarbons, and Cracking and alkenes, matched to the AQA GCSE Chemistry (8462) 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.