Out of `H_(2)S, CO_(2), BeF_(2) and H_(2)O`, the linear molecules are ……………..

Explanation

To determine which of the given molecules (H₂S, CO₂, BeF₂, and H₂O) are linear, we will analyze each molecule step by step.

### Step 1: Analyze H₂S (Hydrogen Sulfide)
1. **Identify the central atom**: Sulfur (S).
2. **Count valence electrons**: Sulfur has 6 valence electrons, and each hydrogen has 1, giving a total of 8 valence electrons.
3. **Determine the structure**: Sulfur forms two single bonds with hydrogen atoms. This leaves 4 electrons as lone pairs on sulfur.
4. **Shape determination**: The presence of two lone pairs and two bond pairs results in a bent shape (not linear).

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