Which compound led to the discovery of compounds of noble gases ?

Explanation

To answer the question "Which compound led to the discovery of compounds of noble gases?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context**: The question pertains to the discovery of compounds involving noble gases, which were previously thought to be inert and unreactive.

2. **Recognize the Key Compound**: The compound that led to the discovery of noble gas compounds is the combination of oxygen (O2) and platinum hexafluoride (PF6).

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