Which of the following statement is correct.

Options

A. (1) All interhalogen compounds are gaseous at room temperature.
B. (2) Interhalogen are either gaseous or liquid at room temperature.
C. (3) lrterhalogens can solid or liquid or gaseous at room temperature.
D. (4) lnterhalogen compounds are liquid at room temperature.

Explanation

To determine which statement about inter-halogen compounds is correct, we can analyze the properties of these compounds step by step.

### Step-by-Step Solution:

1. **Understanding Inter-Halogen Compounds**:
- Inter-halogen compounds are formed from two or more different halogen atoms. Examples include compounds like BrF3 (bromine trifluoride), ClF (chlorine monofluoride), and IF3 (iodine trifluoride).

2. **State of Inter-Halogen Compounds at Room Temperature**:
- Inter-halogen compounds can exist in different states: solid, liquid, or gas at room temperature (approximately 293 K).

3. **Examples of Inter-Halogen Compounds**:
- **Chlorine Monofluoride (ClF)**: This compound is a gas at room temperature.
- **Bromine Trifluoride (BrF3)**: This compound is a solid at room temperature.
- **Iodine Trifluoride (IF3)**: This compound is a liquid at room temperature.

4. **Evaluating the Statements**:
- **Statement 1**: "All inter-halogen compounds are gaseous at room temperature."
- This is incorrect because some inter-halogen compounds are solid or liquid.
- **Statement 2**: "Inter-halogen compounds can exist in vapor, solid, and liquid states at room temperature."
- This is correct as we have seen examples of inter-halogen compounds in all three states.
- **Statement 3**: "Inter-halogens are either gaseous or liquid at room temperature."
- This is incorrect since some are solid.
- **Statement 4**: "Inter-halogen compounds are liquid at room temperature."
- This is incorrect because not all inter-halogen compounds are liquid.

5. **Conclusion**:
- The correct statement is that inter-halogen compounds can exist in vapor, solid, and liquid states at room temperature.

### Final Answer:
The correct statement is: "Inter-halogen compounds can exist in vapor, solid, and liquid states at room temperature."