Choose from the following compounds to answer the questions. H H H—C—C—о-н H H A H2C-CH2 H2C-CH2 H B Ο H3C-C-C-о-н H C H H3C / c=c H3C CH3 D H O HO H3C-C-CH3 CH3 E Ο HO H-O-C-C-O-H CH3 F H CH3 H H3C-C-C-O-C-CH3 H2N-C-C—о-н H CH3 H H G H Each compound may be used once, more than once or not at all.

1. (a)(i)has a molecule with only 11 atoms[1]
2. (a)(ii)is oxidised to form ethanoic acid[1]
3. (a)(iii)is an isomer of butene[1]
4. (a)(iv)reacts with hydrogen in the presence of a catalyst to make an alkane[1]
5. (a)(v)contains four different elements chemically combined.[1]
6. (b)Identify two compounds that have a pH of less than 7 in aqueous solution.[1]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.