Which of the following statements are correct?
A. \(F_2\) is less reactive than \(ClF\)
B. \(F_2\) is more reactive than \(ClF\)
C. \(F-F\) bond is weaker than \(Cl-F\) bond
D. \(F-F\) bond is stronger than \(Cl-F\) bond
Choose the correct answers from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is option 4. B and C only
1. Reactivity (B): Fluorine ($F_2$) is the most reactive of all halogens due to its low bond dissociation enthalpy. While interhalogens are typically more reactive than their parent halogens, $F_2$ remains more reactive than $ClF$.
2. Bond Strength (C): The $F - F$ bond dissociation enthalpy is exceptionally low ($158.8 \text{ kJ/mol}$) because the small size of fluorine atoms results in intense repulsion between their lone pairs. The $Cl - F$ bond is stronger ($253 \text{ kJ/mol}$) by comparison.
3. Conclusion: Since $F_2$ is more reactive and its bond is weaker than that of $ClF$, statements B and C are the only correct choices.