Select the correct options for the following statements.
1. `Cl_(2)O and ClO_(2)` are used as bleaching agents.
2. `OC l^(-)` salts are used as detergent. .
3. `OC l^(-)` disproportionates in alkaline medium.
4. `BrO_(3)^(-)` is oxidized in acidic medium.

Options

A. 1, 2, 3 correct
B. 2, 3, 4 correct
C. 1, 2, 4 correct
D. 1, 3, 4 correct

Answer

To solve the question, we will evaluate each statement one by one to determine if they are true or false.

### Step 1: Evaluate Statement 1
**Statement:** \( Cl_2O \) and \( ClO_2 \) are used as bleaching agents.

**Explanation:** Both \( Cl_2O \) (dichlorine monoxide) and \( ClO_2 \) (chlorine dioxide) are known to release nascent oxygen, which is effective in bleaching. Therefore, this statement is **true**.

### Step 2: Evaluate Statement 2
**Statement:** \( OCl^- \) salts are used as detergents.

**Explanation:** The hypochlorite ion \( OCl^- \) is commonly found in compounds such as sodium hypochlorite, which is widely used as a detergent and disinfectant. Thus, this statement is also **true**.

### Step 3: Evaluate Statement 3
**Statement:** \( OCl^- \) disproportionates in alkaline medium.

**Explanation:** In an alkaline medium, \( OCl^- \) can undergo disproportionation. For example, it can react to form \( Cl_2 \) and \( ClO_3^- \). The balanced reaction is:
\[ 3 OCl^- \rightarrow 2 Cl^- + ClO_3^- \]
This indicates that \( OCl^- \) does indeed disproportionate in alkaline conditions, making this statement **true**.

### Step 4: Evaluate Statement 4
**Statement:** \( BrO_3^- \) is oxidized in acidic medium.

**Explanation:** In acidic medium, \( BrO_3^- \) (bromate ion) does not act as an oxidizing agent; instead, it can be reduced. Therefore, this statement is **false**.

### Conclusion
Based on the evaluations:
- Statement 1: True
- Statement 2: True
- Statement 3: True
- Statement 4: False

Thus, the correct options are **1, 2, and 3**.

### Final Answer
The correct options are **1, 2, and 3**.

---