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5 cards from this section. Quick, good the night before a test.
What is formed when phenol reacts with sodium hydroxide solution?
Phenol behaves as an acid.
Which reagent gives a violet colour with phenol?
It is a solution of an iron(III) salt.
What is formed when phenol is treated with bromine water?
Count the ortho and para positions.
The main product of Kolbe's reaction, after acidification, is
CO₂ introduces a carboxylic acid group.
Direct nitration of phenol with concentrated nitric acid gives picric acid in poor yield. Explain why, and describe the better method of preparing it.
Concentrated nitric acid is both a nitrating agent and an oxidising agent.
Three compounds A, B and C all have the formula C₇H₈O. A dissolves in NaOH solution but not in NaHCO₃ solution and gives a colour with neutral FeCl₃. B does not react with NaOH and gives no colour with FeCl₃, but reacts with sodium to give hydrogen. C reacts with none of NaOH, FeCl₃ or sodium. Identify the type of compound each is and suggest a structure.
Decide for each compound whether it has an –OH group, and if so whether it is phenolic or alcoholic.
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