In case of halogens strong oxidising character is favoured by their

Options

A. Low dissociation energy
B. Low E.A.
C. Low IE
D. Low hydration energy of `X^(Theta)` ion.

Answer

To solve the question regarding why halogens exhibit strong oxidizing character, we can break down the reasoning into clear steps:

### Step-by-Step Solution:

1. **Understanding Halogens**:
- Halogens are the elements in Group 17 of the periodic table, which include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). For the purpose of this discussion, we primarily focus on fluorine, chlorine, bromine, and iodine.

2. **Defining Oxidizing Agents**:
- An oxidizing agent is a substance that can accept electrons from another species, thereby causing the oxidation of that species. The strength of an oxidizing agent is determined by its ability to gain electrons.

3. **Factors Affecting Oxidizing Character**:
- The oxidizing capability of halogens is influenced by three main factors:
- **Electron Affinity**: The energy change when an electron is added to a neutral atom. Higher electron affinity means the atom is more likely to gain an electron.
- **Hydration Energy**: The energy released when ions are solvated in water. Higher hydration energy indicates that the ion will be more stable in solution, enhancing its oxidizing ability.
- **Bond Dissociation Energy**: The energy required to break a bond in a molecule. Lower bond dissociation energy means that the bond is weaker and can be broken more easily, facilitating the release of electrons.

4. **Evaluating the Properties**:
- For halogens to be strong oxidizing agents:
- They should have **high electron affinity** (they readily gain electrons).
- They should have **high hydration energy** (they stabilize well in solution).
- They should have **low bond dissociation energy** (they can easily release electrons).

5. **Conclusion**:
- Among these factors, the property that significantly favors the strong oxidizing character of halogens is their **low bond dissociation energy**. This means that halogens can easily break their bonds and participate in oxidation reactions.

### Final Answer:
- The strong oxidizing character of halogens is favored by their **low bond dissociation energy**.