Which of the following parent acid(s) does/do not have corresponding hypo-oxyacid?

Options

A. `HNO_(3)`
B. `H_(3)PO_(4)`
C. `H_(2)SO_(4)`
D. `HClO_(3)`

Answer

To solve the question of which parent acid(s) do not have corresponding hypo-oxyacid, we need to analyze the given acids one by one.

### Step-by-Step Solution:

1. **Understand the Concept of Hypo-Oxyacids**:
- Hypo-oxyacids are acids that contain fewer oxygen atoms than their corresponding oxyacids. They are typically formed from the same central atom but have one less oxygen atom.

2. **Identify the Parent Acids**:
- The acids mentioned in the question are:
- HNO3 (Nitric Acid)
- H3PO4 (Phosphoric Acid)
- H2SO4 (Sulfuric Acid)
- HClO3 (Chloric Acid)

3. **Analyze Each Acid**:
- **HNO3 (Nitric Acid)**:
- The corresponding hypo-oxyacid is HNO2 (Nitrous Acid). Therefore, it does have a hypo-oxyacid.
- **H3PO4 (Phosphoric Acid)**:
- The hypo-oxyacid is H4P2O6 (Hypophosphoric Acid). Therefore, it does have a hypo-oxyacid.
- **H2SO4 (Sulfuric Acid)**:
- There is no hypo-oxyacid for sulfuric acid. Therefore, it does not have a corresponding hypo-oxyacid.
- **HClO3 (Chloric Acid)**:
- The hypo-oxyacid is HClO2 (Chlorous Acid). Therefore, it does have a hypo-oxyacid.

4. **Conclusion**:
- From the analysis, we find that H2SO4 (Sulfuric Acid) does not have a corresponding hypo-oxyacid.
- The acids that do not have corresponding hypo-oxyacids are HNO3 and H2SO4.

### Final Answer:
The parent acids that do not have corresponding hypo-oxyacids are **HNO3 (Nitric Acid)** and **H2SO4 (Sulfuric Acid)**.