In what forms does sulphur occur in the combined state in nature?

Explanation

### Step-by-Step Solution:

1. **Identify the Forms of Sulphur**: Sulphur occurs in nature in various combined states. The main forms are sulphides, sulphates, and organic compounds.

2. **Understanding Sulphides**:
- Sulphides are compounds that contain sulphur combined with a metal or a non-metal.
- An example of a sulphide is Hydrogen Sulfide (H2S), which is a gas that has a characteristic foul smell.

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