What is the meaning of functional group in an organic compound ? Give the structural formula of the functional groups in (i) acetic acid and (ii) ethyl alcohol.

Explanation

### Step-by-Step Text Solution

**Step 1: Define Functional Group**
A functional group in an organic compound refers to a specific group of atoms or a specific arrangement of atoms that imparts characteristic chemical properties to the compound. It is the part of the molecule that is responsible for its chemical reactions and behavior.

**Step 2: Identify Functional Groups in Given Compounds**
For the compounds mentioned in the question, we need to identify their functional groups:
1. **Acetic Acid (CH₃COOH)**: The functional group present in acetic acid is the carboxylic acid group (-COOH).
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