A-LevelChemistryHydroxy compounds9701/12 · Oct/Nov 2017 · Q261 Mark

Many, but not all, organic reactions need to be heated before a reaction occurs. Which reaction occurs quickly at room temperature (20 °C)?

ACH3OH + PCl5 → CH3Cl + POCl3 + HCl

BCH3CH2Br + KCN → CH3CH2CN + KBr

CCH3CH2OH → C2H4 + H2O

DCH3CH2CN + 2H2O → CH3CH2CO2H + NH3

✓ Correct answer

A: CH3OH + PCl5 → CH3Cl + POCl3 + HCl

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Topic: Hydroxy compounds, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 2, question 26.

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