Rhombic sulphur is the most stable form of sulphur at noramal temperature.

Answer

**Step-by-Step Solution:**

1. **Understanding the Statement**: The question states that "Rhombic sulphur is the most stable form of sulphur at normal temperature." We need to determine if this statement is true or false.

2. **Identifying Rhombic Sulphur**: Rhombic sulphur, also known as octahedral sulphur, is one of the allotropes of sulphur. It is the form of sulphur that is stable at room temperature (around 25°C or 298 K).

3. **Stability at Normal Temperature**: At normal temperatures, rhombic sulphur is indeed the most stable form of sulphur. It does not change into other forms unless subjected to higher temperatures.

4. **Conversion to Monoclinic Sulphur**: When rhombic sulphur is heated above 370 K, it converts into monoclinic sulphur. This indicates that rhombic sulphur is stable at lower temperatures, while monoclinic sulphur is stable at higher temperatures.

5. **Conclusion**: Since rhombic sulphur is the most stable form of sulphur at normal temperatures, the statement given in the question is true.

**Final Answer**: True.

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