Which has ability to release bromine from KBr ?

Options

A. `l_(2)`
B. `Br_(2)`
C. `Cl_(2)`
D. `SO_(2)`

Answer

To determine which substance can release bromine from potassium bromide (KBr), we need to analyze the reactivity of the given compounds: I2, Br2, Cl2, and SO2.

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds given are I2 (iodine), Br2 (bromine), Cl2 (chlorine), and SO2 (sulfur dioxide).

2. **Understand the Reaction**: We are looking for a substance that can oxidize bromide ions (Br-) in KBr to bromine (Br2). This means the substance must be a stronger oxidizing agent than bromine.

3. **Reactivity Series**: In the halogen group, the reactivity decreases from fluorine to iodine. Thus, chlorine (Cl2) is more reactive than bromine (Br2), and iodine (I2) is less reactive than bromine.

4. **Evaluate Each Compound**:
- **I2**: Iodine is less reactive than bromine, so it cannot release bromine from KBr.
- **Br2**: Bromine cannot oxidize bromide ions to release itself; it is the same species.
- **Cl2**: Chlorine is more reactive than bromine and can oxidize bromide ions to bromine.
- **SO2**: Sulfur dioxide is not a halogen and does not have the ability to oxidize bromide ions to bromine.

5. **Conclusion**: The only compound that can release bromine from KBr is Cl2 (chlorine).

### Final Answer:
**Cl2 (chlorine) has the ability to release bromine from KBr.**