Chemistry · May / June 2024 · Paper 12 · Question 6

The melting points and boiling points of four compounds, W, X, Y and Z, are given in the table. | | melting point / °C | boiling point / °C | |---|---|---| | W | 63 | 354 | | X | –7 | 59 | | Y | 1728 | 2230 | | Z | –183 | –89 | The four compounds are silicon(IV) oxide, ethane, bromine and a carboxylic acid of formula C16H32O2. Which row identifies W, X, Y and Z? | | silicon(IV) oxide | ethane | bromine | carboxylic acid C16H32O2 | |---|---|---|---|---| | A | W | X | Z | Y | | B | W | Y | Z | X | | C | Y | Z | W | X | | D | Y | Z | X | W |

1. AW X Z Y
2. BW Y Z X
3. CY Z W X
4. DY Z X W

As printed in the paper