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Alcohols, Phenols and Ethers — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryAlcohols, Phenols and Ethers5 Marks
Question
Write difference between Phenol and Alcohol.
✓

Answer

Difference between Phenol and Alcohol
PropertyPhenol (C6H5OH)Alcohol (C2H5OH)
1.OdourTypical phenolic odour.Pleasent odour.
2.NatureAcidic, dissolves in sodium hydroxide form-ing sodium phenoxide.Neutral, no reaction with alkalies.
3.Reaction with $FeCl _3$Gives violet coluration due to formation of complex compound.No reaction.
4.Reaction with halogen acidsNo reaction with halogen acids.Forms halides. ethyl
5.OxidationPink or brown colour due to formation of quione and phenoqui-none.Undergoes oxidation to give acetaldehyde and acetic acid.
6.Reaction with HCHOForms polymer (bakelite)No reaction.
7.Liebermann's nitroso reactionPositive.Does not show
8.Coupling with benzene diazonium chlorideForms azo dye.Does not form any dye.
9.Reaction with PCl5Mainly forms tri-phenyl phosphate.Forms chloride. ethyl

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