Phenols turn blue litmus red. Alcohols do not have any effect on paper.
Phenols react with bromine water to give a white ppt. of 2,4,6-tribromophenol (discussed in Electrophilic substitution in phenol). Alcohols do not have any action with bromine water.
Phenols form azo-dyes (yellow-orange coloured) by coupling with arene diazonium salts . Alcohols do not react.
Phenols react with aqueous NaOH to form phenoxide ion (C6H5O−). Alcohols do not react with aqueous NaOH.
Phenols usually give violet colour when react with neutral FeCl3. Alcohols do not react with neutral FeCl3
The colour may vary from violet to blue, green or red depending on the nature of the phenol.
Note : Enols give positive results with FeCl3.