Which of the following statement are correct ?

Options

A. Among halogens, radius ratio between iodine and fluorine is maximum
B. Leaving F-F bond, all halogens have weaker X-X bod than X-X' bond in interhalogens
C. Among interhalogen compounds maxium number of atoms are present in iodine flrouide
D. Interhalogen compounds are more reactive than halogen compound

Explanation

To determine which statements regarding halogens are correct, we will analyze each statement step by step.

### Step 1: Analyze the Radius Ratio
- **Statement**: The radius ratio between iodine and fluorine is maximum.
- **Explanation**: In the halogen group (Group 17), as we move down from fluorine to iodine, the atomic radius increases. The radius of iodine is significantly larger than that of fluorine. Therefore, the ratio of their radii (iodine to fluorine) is indeed maximum compared to other halogen pairs.
- **Conclusion**: This statement is **correct**.

### Step 2: Analyze the Bond Strength of F-F
- **Statement**: The F-F bond is weaker than other halogen bonds.
- **Explanation**: The F-F bond is known to be relatively weak compared to other halogen bonds due to the small size of fluorine atoms, which leads to significant repulsion between the lone pairs of electrons. Other halogen bonds (like Cl-Cl, Br-Br, etc.) are stronger due to larger atomic sizes and less lone pair repulsion.
- **Conclusion**: This statement is **incorrect**.

### Step 3: Analyze Interhalogen Compounds
- **Statement**: Among interhalogen compounds, the maximum number of atoms are present in iodine and fluorine.
- **Explanation**: Interhalogen compounds are formed between different halogens. The statement implies that compounds like ICl, IF, etc., can contain a maximum number of atoms. However, the number of atoms in interhalogen compounds can vary, and the statement is somewhat misleading. It is important to clarify that while iodine can form several interhalogen compounds, it does not necessarily mean it has the maximum number of atoms in all cases.
- **Conclusion**: This statement is **incorrect**.

### Step 4: Reactivity of Interhalogen Compounds
- **Statement**: Interhalogen compounds are more reactive than halogen compounds.
- **Explanation**: Interhalogen compounds are generally more reactive than the corresponding diatomic halogen molecules due to the presence of different halogens, which can lead to more polar bonds and greater reactivity. For example, compounds like ICl and BrF are more reactive than Cl2 or Br2.
- **Conclusion**: This statement is **correct**.

### Summary of Correct Statements:
1. The radius ratio between iodine and fluorine is maximum. (Correct)
2. The F-F bond is weaker than other halogen bonds. (Incorrect)
3. Among interhalogen compounds, the maximum number of atoms are present in iodine and fluorine. (Incorrect)
4. Interhalogen compounds are more reactive than halogen compounds. (Correct)

### Final Answer:
The correct statements are:
- Statement 1
- Statement 4