Which of the following pairs has bleaching property

Options

A. `O_(3)` and `NO_(2)`
B. `O_(3)` and `H_(2)S`
C. `SO_(2)` and`Cl_(2)`
D. `Cl_(2)` and `NO_(2)`

Answer

To determine which of the following pairs has bleaching properties, we need to analyze the chemicals involved and their respective actions related to bleaching.

### Step-by-Step Solution:

1. **Understanding Bleaching Agents**:
- Bleaching agents are substances that can lighten or remove color from materials. They usually work through oxidation or reduction processes.

2. **Identifying the Chemicals**:
- The question mentions two chemicals: SO2 (sulfur dioxide) and Cl2 (chlorine gas).

3. **Analyzing SO2 (Sulfur Dioxide)**:
- SO2 acts as a reducing agent. It can remove oxygen from colored compounds, which leads to the decolorization of these compounds. Thus, it has temporary bleaching properties.

4. **Analyzing Cl2 (Chlorine Gas)**:
- Cl2 acts as an oxidizing agent. When chlorine gas is dissolved in water, it produces nascent oxygen (O), which can oxidize colored compounds, leading to bleaching. This is a strong bleaching property.

5. **Combining the Actions**:
- Since SO2 provides a reducing action and Cl2 provides an oxidizing action, the combination of these two can effectively bleach materials.

6. **Conclusion**:
- Therefore, the pair SO2 and Cl2 has bleaching properties due to their respective actions as a reducing agent and an oxidizing agent.

### Final Answer:
The pair that has bleaching property is **SO2 and Cl2**.

---