The displayed formula of compound Z is shown.

What is the molecular formula of the member of the same homologous series that has two more carbon atoms than Z?
C6H12O\mathrm{C_{6}H_{12}O}C6H12O
C5H10O2\mathrm{C_{5}H_{10}O_{2}}C5H10O2
C6H12O2\mathrm{C_{6}H_{12}O_{2}}C6H12O2
C6H14O2\mathrm{C_{6}H_{14}O_{2}}C6H14O2
63 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.