Fixed melting point of an organic compound informs

Options

A. Purity of an organic compound.
B. Conductivity of compound
C. Chemical nature of compound
D. Whether the compound is liquid or gas.

Answer

To answer the question "What does the fixed melting point of an organic compound inform us?", we can break down the explanation into the following steps:

### Step-by-Step Solution:

1. **Definition of Melting Point**:
- The melting point is defined as the temperature at which a solid turns into a liquid. At this temperature, the solid and liquid phases of the substance are in equilibrium.

2. **Understanding Fixed Melting Point**:
- A fixed melting point indicates that the substance has a specific temperature at which it melts. This is characteristic of pure substances.

3. **Impurities and Melting Point Range**:
- If a compound contains impurities, the melting point will not be fixed. Instead, it will exhibit a range of melting points because the impurities will affect the melting behavior of the compound.

4. **Conclusion on Purity**:
- Therefore, a fixed melting point signifies that the organic compound is pure, as there are no impurities present that could alter the melting behavior.

5. **Final Answer**:
- The fixed melting point of an organic compound informs us about its purity.