Which of the following is not the characteristic of interhalogen compounds?

Options

A. They are more reactive than halogens.
B. They are quite unstable but none of them is explosive
C. They are covalent in nature
D. They have low boiling point and are highly volatile.

Answer

To determine which of the following is not a characteristic of interhalogen compounds, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Interhalogen Compounds**:
- Interhalogen compounds are formed from the combination of two different halogens. Examples include iodine chloride (ICl), bromine fluoride (BrF), etc.

2. **Analyzing the Options**:
- **Option 1**: "They are more stable, they are more reactive than halogens."
- Interhalogen compounds are generally more reactive than the diatomic halogens (like Cl2, Br2) due to weaker bonds between different halogen atoms compared to bonds between identical halogen atoms. Therefore, this statement is true.

- **Option 2**: "They are quite unstable but none of them is explosive."
- Interhalogen compounds tend to be unstable due to weak bonds, but they are not typically explosive. This statement is also true.

- **Option 3**: "They are covalent in nature."
- Interhalogen compounds are formed by sharing electrons between different halogen atoms, which leads to the formation of covalent bonds. This statement is true.

- **Option 4**: "They have low boiling point and they are highly volatile."
- Interhalogen compounds generally have moderate boiling points and are not highly volatile. They are often liquids at room temperature, which contradicts the statement. Therefore, this statement is false.

3. **Conclusion**:
- The option that is **not** a characteristic of interhalogen compounds is **Option 4**: "They have low boiling point and they are highly volatile."

### Final Answer:
**Option 4** is not a characteristic of interhalogen compounds.

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