Distinction between pairs of compounds Ethane and Ethyne or Acetylene.

Explanation

### Step-by-Step Solution:

1. **Identify the Compounds**:
- Ethane (C2H6) and Ethyne (C2H2, also known as Acetylene).

2. **Classification of Compounds**:
- Ethane is classified as a **saturated hydrocarbon** because it contains only single bonds between carbon atoms.
- Ethyne is classified as an **unsaturated hydrocarbon** because it contains a triple bond between carbon atoms.
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