Which balanced equation is complete combustion of ethene?
C2H4+2O2→2CO+2H2O\mathrm{C_2H_4+2O_2\rightarrow2CO+2H_2O}C2H4+2O2→2CO+2H2O
C2H4+O2→2C+2H2O\mathrm{C_2H_4+O_2\rightarrow2C+2H_2O}C2H4+O2→2C+2H2O
C2H4+2O2→2CO2+2H2O\mathrm{C_2H_4+2O_2\rightarrow2CO_2+2H_2O}C2H4+2O2→2CO2+2H2O
C2H4+3O2→2CO2+2H2O\mathrm{C_2H_4+3O_2\rightarrow2CO_2+2H_2O}C2H4+3O2→2CO2+2H2O
36 exam-style questions on Edexcel GCSE Chemistry 10.2 Hydrocarbons, covering 10.2.1 Formulae and structures of the alkanes, 10.2.2 Alkenes and the C=C functional group, 10.2.3 Addition reactions of alkenes and testing for unsaturation, and 10.2.4 Combustion of alkanes and alkenes. Each one has a worked solution and a mark scheme showing where the marks go.