State the meaning of functional group in a carbon compound. Write the functional group present in (i) ethanol and (ii) ethanoic acid and also draw their structures.

Explanation

### Step-by-Step Solution

1. **Definition of Functional Group**:
A functional group in a carbon compound is a specific group of atoms within a molecule that is responsible for the characteristic chemical reactions of that molecule. It determines the chemical properties and reactivity of the compound.

2. **Functional Group in Ethanol**:
- **Chemical Formula**: The chemical formula of ethanol is C₂H₅OH or CH₃CH₂OH.
- **Structure**: The structure of ethanol can be represented as:
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