The correct order of the acidic strength is:

Options

A. `HClO_(4) lt HClO_(3) lt HClO_(2) HClO`
B. ` HClO lt HClO_(2)lt HClO_(3) lt HClO_(4)`
C. `HClO lt HClO_(3) lt HClO_(2) lt HClO_(4)`
D. `HClO_(4) lt HClO_(2) lt HClO lt HClO_(3)`

Explanation

To determine the correct order of acidic strength among the given compounds (HClO, HClO2, HClO3, and HClO4), we need to analyze the stability of their conjugate bases. The acidic strength of a compound is directly related to the stability of its conjugate base; the more stable the conjugate base, the stronger the acid.

### Step-by-Step Solution:

1. **Identify the Compounds and Their Conjugate Bases**:
- For HClO (hypochlorous acid), the conjugate base is ClO⁻.
- For HClO2 (chlorous acid), the conjugate base is ClO2⁻.
- For HClO3 (chloric acid), the conjugate base is ClO3⁻.
- For HClO4 (perchloric acid), the conjugate base is ClO4⁻.

2. **Analyze the Stability of the Conjugate Bases**:
- The stability of the conjugate bases can be assessed based on the number of oxygen atoms and the resonance structures available. More oxygen atoms generally lead to greater resonance stabilization.
- ClO⁻ has 1 oxygen atom, which means it has limited resonance.
- ClO2⁻ has 2 oxygen atoms, allowing for more resonance structures than ClO⁻.
- ClO3⁻ has 3 oxygen atoms, providing even greater resonance stabilization.
- ClO4⁻ has 4 oxygen atoms, which allows for the maximum resonance stabilization among the four conjugate bases.

3. **Order of Stability of Conjugate Bases**:
- Based on the number of oxygen atoms and the resulting resonance stabilization, we can order the stability of the conjugate bases as follows:
- ClO4⁻ > ClO3⁻ > ClO2⁻ > ClO⁻

4. **Determine the Order of Acidic Strength**:
- Since the stability of the conjugate base is directly proportional to the acidic strength, we can conclude the order of acidic strength:
- HClO4 > HClO3 > HClO2 > HClO

5. **Final Conclusion**:
- The correct order of acidic strength is HClO4 > HClO3 > HClO2 > HClO.