`PH_(3)` has lower boiling point that `NH_(3)`. Why ?

Explanation

To understand why PH₃ has a lower boiling point than NH₃, we need to analyze the molecular structure and the types of intermolecular forces present in each compound. Here’s a step-by-step explanation:

### Step 1: Identify the Compounds
- **NH₃ (Ammonia)**: Composed of nitrogen and hydrogen.
- **PH₃ (Phosphine)**: Composed of phosphorus and hydrogen.

### Step 2: Analyze the Molecular Structure
- **NH₃** has a trigonal pyramidal shape due to the presence of a lone pair on nitrogen.
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