A-Level ChemistryYear 2021Q7
Turn over 15 7 This question is about the solubility of some alcohols. The table shows the solubility in water of the first six alcohols in a homologous series. Alcohol Solubility / g dm–3 methanol soluble in all proportions ethanol soluble in all proportions propan-1‑ol soluble in all proportions butan-1‑ol 632 pentan-1‑ol 22 hexan-1‑ol 5.9 (a) State what is meant by a homologous series. You may use the alcohols in the table to illustrate your answer. (1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (b) Explain why methanol and water are ‘soluble in all proportions’. You must include a diagram in your answer. (3) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (Total for Question 7 = 4 marks)
Paper Source:8CH0_02_que_20211013.pdf
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Exam Specification Info
This question is part of the UK A-Level Chemistry syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
Syllabus levelAdvanced Level (A-Level)
SubjectChemistry
Official MarksVariable (2–6 marks)