Which of the following will give characteristic colour with FeCl_(3) ?

1.	Which of the following will give characteristic colour with FeCl_(3) ?
Answer» `CH_(3)-overset(O)overset(\|\|)(C)-CH_(2)-overset(O)overset(\|\|)(C)-OH` Solution :Phenol give characteristic colour with `FeCl_(3)` solution. DUE to keto-enol tautomerism `beta`-ketoaldehyde (C) and `beta`-keto acid (D) will give characteristic colours with `FeCl_(3)` solution. In these TWO cases the enol form is sufficiently stable due to HYDROGEN bonding.

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