Phenol + FeCl3 Reaction: Distinguish 4-Methylbenzoic Acid

[chiral]

phenol + FeCl3..help!

please help me...
phenol gives a violet coloration when we add FeCl3, but will 4-methylphenol gives a violet coloration?!?
n is it possible to distinguish 4-methylbenzoic acid from 4-methylphenol by adding FeCl3?
sorry for my poor english

 

[GCT]

The test is fairly specific for phenols, thus I'm thinking that the methyl phenol will also test positive; not all phenols test positive however. Yes, this test will distinguish between phenols and acids.

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[chiral]

thx a lot...