(a)[1]
Draw the structure of ethane so that every atom and bond is shown.
(b)[2]
Complete the equation for the complete combustion of propane: $\text{C}_3\text{H}_8 + 5\text{O}_2 \rightarrow \ldots\,\text{CO}_2 + \ldots\,\text{H}_2\text{O}$.
(c(i))[1]
State one further process that releases methane into the atmosphere.
(c(ii))[1]
Give one important use of methane.
(d)[2]
State what is meant by the term hydrocarbon.
(e)[1]
Name the reagent used to distinguish alkanes from alkenes.
(f(i))[1]
Name one element that is also made during the cracking of alkanes.
(f(ii))[1]
State one condition needed for cracking alkanes.