(a)[2]
Complete Table 6.1 by stating the observations seen when two different reagents are added to separate samples of $\text{Z(aq)}$.
(b)[1]
Table 6.2 gives the percentage by mass of each element in Z. Using the figures in Table 6.2, show that the empirical formula of Z is $\text{CHO}$. Show your working.
(c(i))[1]
Deduce the molecular formula of Z. Explain your answer with reference to the molecular ion peak in Fig. 6.1 and the empirical formula of Z.
(c(ii))[2]
Use Fig. 6.1 to suggest the formulae of the fragments responsible for the $m / e$ peaks at 45 and 71.
(c(iii))[1]
Suggest the structure of Z by using the relevant information from Table 6.1, (b) and (c).