d) During the preparation of ethene gas in the laboratory, a mixture of ethanol and concentrated sulphuric acid was heated gently and an oily liquid X and water were formed. When the mixture was heated to \( 170^{\circ} \mathrm{C} \), a steady steam of ethene gas was produced. During this process, the flask was kept cool. i). Write the equation for the reaction between ethanol and concentrated sulphuric acid. \( (2 \) marks)

\( Ca ( OH ) _ { 2 } + Al _ { 2 } ( SO _ { 4 } ) _ { 3 } \rightarrow CaSO _ { 4 } + AL ( OH ) _ { 3 } \)

Please select the molecule(s) with resonance structures from the following. CCl 4 CHCl 3 SO 3 H 2 O None

Please select the molecule(s) that 1) its molecular shape is different from its electron group shape, and/or 2) the central bonds are not identical. NH3 BF3 PFF PF3

Please select polar molecule(s) from the following. NH3 BF3 PF5 PF3

Based on your worksheet results, please match the following: [he molecular shape of NH 3 is [Choose ] [Choose ] [Choose ] [Che molecular shape of BF3 is [Choose] The molecular shape of PF3 is