When .............. Is heatd with .......... Phosphine is obtained.

Explanation

To solve the question "When .............. is heated with .......... phosphine is obtained," we can fill in the blanks based on the information provided in the video transcript.

### Step-by-Step Solution:

1. **Identify Phosphine**:
- Phosphine is a chemical compound with the formula \( PH_3 \). It is a hydride of phosphorus, colorless, and highly poisonous.

2. **Determine the Reactants**:
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