Which is incorrect?

Options

A. `F_2` is better oxidising agent than `Cl_2`
B. `Cl_2` is more reactive than `ClF`
C. `F_2` is more reactive than `ClF`
D. On hydrolysis `ClF` gives `HOCl` and `HF`

Answer

To determine which statement is incorrect among the given options, let's analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement:** F2 is a better oxidizing agent than Cl2.

- **Explanation:** An oxidizing agent is a substance that gains electrons and is reduced in a chemical reaction. Fluorine (F2) is known to be a stronger oxidizing agent than chlorine (Cl2) because it has a higher electronegativity and a weaker bond (due to electron-electron repulsion in the F2 molecule). Therefore, F2 can easily accept electrons from other substances, making it a better oxidizing agent than Cl2.

- **Conclusion:** This statement is **correct**.

### Step 2: Analyze the second statement
**Statement:** Cl2 is more reactive than ClF.

- **Explanation:** ClF (chlorine fluoride) is an interhalogen compound, which typically has weaker bonds compared to diatomic halogens like Cl2. Interhalogen compounds are often more reactive than their parent halogen molecules because the bond between different halogens is generally weaker. Therefore, ClF is more reactive than Cl2.

- **Conclusion:** This statement is **incorrect**.

### Step 3: Analyze the third statement
**Statement:** F2 is more reactive than ClF.

- **Explanation:** The bond in F2 is weaker than that in ClF, which means F2 can react more readily. Thus, F2 is indeed more reactive than ClF.

- **Conclusion:** This statement is **correct**.

### Step 4: Analyze the fourth statement
**Statement:** On hydrolysis, ClF gives HOCl and HF.

- **Explanation:** When ClF undergoes hydrolysis, it reacts with water to produce hypochlorous acid (HOCl) and hydrofluoric acid (HF). The bond between Cl and F breaks, leading to the formation of these two products.

- **Conclusion:** This statement is **correct**.

### Final Conclusion
The only incorrect statement among the options provided is:

**Cl2 is more reactive than ClF.**