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WalesChemistryQuick questions
Unit 4: Organic Chemistry and Analysis
Quick questions on Alcohols and phenols - WJEC A-Level Chemistry
7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are summary of distinguishing tests?Show answer
Note that sodium reacts with both because both have an bond, so it cannot distinguish them; the first three tests can.
What are antiseptics and resins?Show answer
Phenol's reactivity underpins antiseptics and phenol-formaldehyde resins (Bakelite), while its weak acidity is exploited in separating it from neutral organics. Breathalysers and oxidation. The orange-to-green oxidation of ethanol by acidified dichromate, the same reaction tested here, was the chemistry behind early roadside breathalysers.
What is q1?Show answer
State the reagent that distinguishes phenol from ethanol and the observation for phenol. [1 mark]
What is q2?Show answer
Name the organic product when a secondary alcohol is oxidised. [1 mark]
What is q3?Show answer
Explain why phenol is acidic. [1 mark]
What is q4?Show answer
Explain why phenol reacts with bromine water without a catalyst but benzene does not. [2 marks]
What is q5?Show answer
Name the organic product when a tertiary alcohol is warmed with acidified dichromate. [1 mark]
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