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 correct or incorrect.

### Step 1: Evaluate Statement 1
**Statement:** `Cl2O and ClO2` are used as bleaching agents.

**Analysis:**
- Chlorine dioxide (`ClO2`) and dichlorine monoxide (`Cl2O`) are indeed used as bleaching agents.
- They release nascent oxygen which is effective in bleaching applications, particularly in the textile industry.
- `Cl2O` is known to be a stronger bleaching agent than chlorine itself.

**Conclusion:** Statement 1 is **correct**.

### Step 2: Evaluate Statement 2
**Statement:** `OCl^-` salts are used as detergent.

**Analysis:**
- The hypochlorite ion (`OCl^-`) is commonly found in compounds like bleaching powder (calcium hypochlorite).
- These compounds are used in detergents for their antimicrobial properties and bleaching effects.

**Conclusion:** Statement 2 is **correct**.

### Step 3: Evaluate Statement 3
**Statement:** `OCl^-` disproportionates in alkaline medium.

**Analysis:**
- Disproportionation reactions involve a species being simultaneously oxidized and reduced.
- In alkaline conditions, `OCl^-` can disproportionate to form chlorine gas (`Cl2`) and chlorate ions (`ClO3^-`).
- The balanced equation for this reaction confirms that chlorine in `OCl^-` goes from an oxidation state of +1 to 0 (reduction) and to +5 (oxidation).

**Conclusion:** Statement 3 is **correct**.

### Step 4: Evaluate Statement 4
**Statement:** `BrO3^-` is oxidized in acidic medium.

**Analysis:**
- In acidic medium, bromate ions (`BrO3^-`) are actually reduced, not oxidized.
- They are reduced to bromine (`Br2`), where the oxidation state of bromine decreases from +5 in bromate to 0 in bromine.

**Conclusion:** Statement 4 is **incorrect**.

### Final Conclusion:
The correct statements are 1, 2, and 3. Therefore, the answer is that statements 1, 2, and 3 are correct.

### Summary of Correct Statements:
- **Correct Statements:** 1, 2, and 3
- **Incorrect Statement:** 4

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