V is a colourless liquid. [Figure 4.1]

1. (a)(i)V reacts with an excess of LiAlH₄ to form W. Draw the structure of W in the box.[1]
2. (a)(ii)Identify the role of LiAlH₄ in the reaction with V.[1]
3. (b)(i)V reacts to form Z in a single reaction, as shown in Fig. 4.2. [Figure 4.2] Suggest the reagent and conditions needed to form Z from V.[1]
4. (b)(ii)Deduce the empirical formula of Z.[1]
5. (b)(iii)Complete Table 4.1 to show the number of sp² and sp³ hybridised carbon atoms that are present in a molecule of V. [Table 4.1][2]
6. (c)Q contains the elements carbon, hydrogen and oxygen only. It is a saturated molecule with no branching in its carbon backbone. Q contains only one functional group. The relative molecular mass of Q is 88. No effervescence is seen when Na₂CO₃ is added to Q. Effervescence is seen when sodium is added to Q. Q reacts with alkaline I₂(aq) to form a yellow precipitate. Draw the structure of Q in the box.[2]

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