Which among the following is//are peroxo acid (s) ?

Options

A. `H_(2)S_(2)O_(3)`
B. `H_(2)SO_(5)`
C. `H_(2)S_(2)O_(7)`
D. `H_(2)S_(2)O_(8)`

Explanation

To determine which among the given options are peroxo acids, we need to identify the presence of a peroxy linkage in the structures of the acids. A peroxy linkage is characterized by the presence of an O-O bond (where two oxygen atoms are bonded to each other).

### Step-by-Step Solution:

1. **Identify the Given Options**:
We have four options to analyze:
- Option A: H₂S₂O₃
- Option B: H₂SO₅
- Option C: H₂S₂O₇
- Option D: H₂S₂O₈

2. **Analyze Option A (H₂S₂O₃)**:
- Draw the structure of H₂S₂O₃.
- In this structure, check for the presence of an O-O bond.
- **Conclusion**: There is no peroxy linkage in H₂S₂O₃. Therefore, it is **not a peroxo acid**.

3. **Analyze Option B (H₂SO₅)**:
- Draw the structure of H₂SO₅.
- Look for any O-O bonds in the structure.
- **Conclusion**: H₂SO₅ contains a peroxy linkage (O-O bond). Therefore, it is a **peroxo acid**.

4. **Analyze Option C (H₂S₂O₇)**:
- Draw the structure of H₂S₂O₇.
- Check for the presence of an O-O bond.
- **Conclusion**: There is no peroxy linkage in H₂S₂O₇. Therefore, it is **not a peroxo acid**.

5. **Analyze Option D (H₂S₂O₈)**:
- Draw the structure of H₂S₂O₈.
- Look for any O-O bonds in the structure.
- **Conclusion**: H₂S₂O₈ contains a peroxy linkage (O-O bond). Therefore, it is a **peroxo acid**.

### Final Answer:
The peroxo acids among the given options are **Option B (H₂SO₅)** and **Option D (H₂S₂O₈)**.