A sample on the addition of one drop of Iron (III) chloride showed a light blue colour whichbecame deep blue after a while. This compound is likely to be--------------A. a carboxylic acidB. an amineC. a phenolD. an ester

The compound is likely to be C. a phenol.

Here's why:

Iron (III) chloride (FeCl3) is used as a test for phenols. When a drop of FeCl3 is added to a phenol, it forms a complex that results in a color change. The color can vary from green to purple, but in this case, it's described as light blue becoming deep blue. This color change is a positive result indicating the presence of a phenol.

Carboxylic acids, amines, and esters do not give this color change with FeCl3. Therefore, the compound in question is likely a phenol.

The compound is likely to be C. a phenol.

Here's why:

Iron (III) chloride (FeCl3) is used as a test for phenols. When a drop of FeCl3 is added to a phenol, it forms a complex that results in a color change. The color can vary from green to purple, but in this case, it's described as light blue becoming deep blue. This color change is indicative of a phenol.

Carboxylic acids, amines, and esters do not react with FeCl3 in the same way and would not produce the described color change. Therefore, the compound is likely a phenol.