Which of the following statements reagarding interhalogens is not correct?

Options

A. Interhalogens involve covalent bonding
B. Interhalogens are less reactive than halogens
C. `(ICI_3)_2` in fused from shows enhanced electrical conductivity
D. Interhalogens of the formula `XX_4`

Answer

To solve the question regarding which statement about interhalogens is not correct, we will analyze each statement provided in the options.

### Step-by-Step Solution:

1. **Understanding Interhalogens**:
Interhalogens are compounds formed between two different halogens. They exhibit unique properties that differ from those of the individual halogens.

2. **Analyzing the Statements**:
- **Statement 1**: Interhalogens are formed by covalent bonding between non-metals.
- **Analysis**: This statement is correct. Interhalogens are indeed formed by covalent bonds due to the sharing of electrons between the halogens.

- **Statement 2**: Interhalogens are less reactive than halogens.
- **Analysis**: This statement is incorrect. Interhalogens are generally more reactive than the halogens, with the exception of fluorine. Therefore, this is the statement we are looking for.

- **Statement 3**: AlCl3 (aluminum chloride) when fused enhances electrical conductivity.
- **Analysis**: This statement is correct. When AlCl3 is fused, it dissociates into ions, which increases its electrical conductivity.

- **Statement 4**: The general formula of interhalogens is XYn, where n can take odd values (1, 3, 5, 7).
- **Analysis**: This statement is correct. The general formula for interhalogens does indeed allow for odd values of n.

3. **Conclusion**:
The statement that is not correct regarding interhalogens is **Statement 2**: "Interhalogens are less reactive than halogens."

### Final Answer:
The statement regarding interhalogens that is not correct is: **Interhalogens are less reactive than halogens.**

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