1.

Which of the following reagents is used to distinguish between benzoic acid from phenol ?

Answer»

Molish reagent
Tollen's reagent
5% NAOH
Neutral `FeCl_3`

Solution :Phenol as well as benzoic acid form salt with `NaOH_((aq))` . Both are unaffected by Tollen.s reagent and Molisch reagent . Phenol form coloured COMPLEX with `FeCl_3` unlike benzoic acid .
`FeCl_3 +6 C_6 H_5 OH to 3 H^(+) + [Fe (OC_(6) H_(5))_(6) ]^(3-) + 3HCL`


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