Which of the following oxoacids of sulpher has -O-O- linkage ?

Options

A. `H_(2)S_(2)O_(6)`
B. `H_(2)S_(2)O_(8)`
C. `H_(2)S_(2)O_(3)`
D. `H_(2)S_(4)O_(6)`

Explanation

To determine which oxoacid of sulfur has a -O-O- linkage, we need to analyze the structures of the given acids. Let's go through each of the options step by step.

### Step 1: Identify the oxoacids of sulfur
We have the following oxoacids of sulfur to analyze:
1. H₂S₂O₆ (Dithionic acid)
2. H₂S₂O₈ (Peroxydisulfuric acid)
3. H₂S₂O₃ (Thiosulfuric acid)
4. H₂S₄O₆ (Tetrathionic acid)

### Step 2: Draw the structures of each oxoacid

**A. Dithionic Acid (H₂S₂O₆)**
- Structure:
- S(=O)₂-S(=O)₂-OH
- There are no -O-O- linkages in this structure.

**B. Peroxydisulfuric Acid (H₂S₂O₈)**
- Structure:
- S(=O)₂-O-O-S(=O)₂
- This structure contains a -O-O- linkage, indicating that it has a peroxide bond.

**C. Thiosulfuric Acid (H₂S₂O₃)**
- Structure:
- S(=O)-S(=O)-OH
- There are no -O-O- linkages in this structure.

**D. Tetrathionic Acid (H₂S₄O₆)**
- Structure:
- S(=O)-S(=O)-S(=O)-OH
- There are no -O-O- linkages in this structure.

### Step 3: Analyze the structures for the -O-O- linkage
From the structures drawn:
- Dithionic acid does not have a peroxide linkage.
- Peroxydisulfuric acid does have a peroxide linkage.
- Thiosulfuric acid does not have a peroxide linkage.
- Tetrathionic acid does not have a peroxide linkage.

### Conclusion
The only oxoacid of sulfur that has a -O-O- linkage is **H₂S₂O₈ (Peroxydisulfuric acid)**.

### Final Answer
**H₂S₂O₈ (Peroxydisulfuric acid)** has the -O-O- linkage.

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