Question

1. the compounds below give a purple color with iron(iii) chloride solution. circle the part in each structure responsible for the reaction that gives this test.

Explanation:

Step1: Recall the reaction principle

Phenolic - OH groups react with iron(III) chloride to give a purple - colored complex.

Step2: Identify phenolic - OH groups in structures

In each of the given structures, circle the phenolic - OH groups. Phenolic - OH is an - OH group directly attached to an aromatic ring.

Answer:

The circled parts in the provided structures are the phenolic - OH groups (the - OH groups directly attached to the aromatic rings) as they are responsible for the purple - color reaction with iron(III) chloride solution.