The set with the correct order of acidity is

Options

A. `HOCI lt HCIO_(2) lt HCIO_(3)HCIO_(4)`
B. `HCIO_(4) lt HCIO_(3) lt HCIO_(2) lt HOCI`
C. `HOCI lt HCIO_(4) lt HCIO_(3)lt HCIO_(2)`
D. `HCIO_(4) lt HCIO_(2) lt HCIO_(3) lt HOCI`

Explanation

To determine the correct order of acidity for the given acids (HClO, HClO2, HClO3, and HClO4), we need to analyze their conjugate bases and the factors affecting their stability.

### Step-by-Step Solution:

1. **Identify the Acids and Their Conjugate Bases**:
- The acids are HClO, HClO2, HClO3, and HClO4.
- Their conjugate bases are ClO⁻, ClO2⁻, ClO3⁻, and ClO4⁻ respectively.

2. **Understand the Stability of Conjugate Bases**:
- The stability of a conjugate base is crucial in determining the strength of the corresponding acid. A more stable conjugate base indicates a stronger acid.
- The stability of these conjugate bases increases with the number of oxygen atoms attached to the chlorine atom. More oxygen atoms can delocalize the negative charge better.

3. **Order of Stability of Conjugate Bases**:
- ClO⁻ (from HClO) is the least stable because it has only one oxygen atom.
- ClO2⁻ (from HClO2) is more stable than ClO⁻ due to the presence of an additional oxygen atom.
- ClO3⁻ (from HClO3) is even more stable than ClO2⁻.
- ClO4⁻ (from HClO4) is the most stable conjugate base due to the maximum number of oxygen atoms (four).

4. **Order of Acidity**:
- Since the stability of the conjugate base is directly related to the acidity of the acid, we can conclude:
- HClO < HClO2 < HClO3 < HClO4
- This means HClO is the weakest acid, while HClO4 is the strongest acid.

5. **Final Conclusion**:
- The correct order of acidity is: HClO < HClO2 < HClO3 < HClO4.