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

Options

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

Explanation

To solve the question of which parent acid(s) do not have corresponding hypo-oxyacid, we can follow these steps:

### Step 1: Understand the Concept of Oxyacids
Oxyacids are acids that contain oxygen, hydrogen, and another element (the central atom). They can be represented in the general form HnXOm, where X is the central atom and n and m are integers.

### Step 2: Identify the Types of Oxyacids
Oxyacids can have different forms based on the number of oxygen atoms:
- **Ic acids**: These are the acids with a higher number of oxygen atoms.
- **Hypo-oxyacids**: These are derived from the corresponding ic acids and have fewer oxygen atoms than the ic form.

### Step 3: Determine the Presence of Pyroacids
A pyroacid is a type of oxyacid that has a specific structure, usually containing more oxygen than its corresponding ic acid. The presence of a pyroacid is essential for the formation of a hypo-oxyacid.

### Step 4: Analyze the Given Acids
Now, we need to analyze the given acids to see if they have corresponding pyroacids:
- **HClO3 (Chloric acid)**: This acid does not have a corresponding pyroacid (HClO4 is the peracid, and HClO2 is the lesser acid). Therefore, it cannot have a hypo-oxyacid.
- Other acids should be checked similarly.

### Step 5: Conclusion
Since HClO3 does not have a corresponding pyroacid, it does not have a hypo-oxyacid. Thus, the answer to the question is that HClO3 does not have a corresponding hypo-oxyacid.

### Summary of the Solution:
- The parent acid HClO3 does not have a corresponding hypo-oxyacid because it lacks a pyroacid.