The incorrect statement about the oxoacids, `HClO_(4)` and `HClO`, is

Options

A. The central atom in both `HClO_(4)` and `HClO` is `sp^(3)` hybridized
B. `HClO_(4)` is formed in the reaction between `Cl_(2)` and `H_(2)O`
C. The conjugate base of `HClO_(4)` weaker base than `H_(2)O`
D. `HClO_(4)` is more acidic than `HClO` because of the resonance stabilization of its anion

Answer

To determine the incorrect statement about the oxoacids HClO₄ and HClO, we will analyze each statement one by one.

### Step 1: Analyze the Hybridization of HClO₄ and HClO
- **HClO₄ (Perchloric Acid)**: The central atom is chlorine (Cl). In HClO₄, chlorine is bonded to four oxygen atoms (one with a double bond and three with single bonds), which gives it a tetrahedral geometry. The hybridization of Cl in HClO₄ is **sp³** because it forms four sigma bonds.

- **HClO (Hypochlorous Acid)**: In HClO, chlorine is bonded to one oxygen atom (with a single bond) and has three lone pairs. The hybridization of Cl in HClO is also **sp³** because it forms one sigma bond and has three lone pairs.

**Conclusion for Step 1**: Both HClO₄ and HClO have a central chlorine atom that is sp³ hybridized.

### Step 2: Check if HClO₄ is Formed from Cl₂ and H₂O
- The reaction between Cl₂ and H₂O primarily produces HCl and HClO, but not HClO₄ directly. HClO₄ is typically formed through further oxidation processes or reactions involving ClO₃⁻.

**Conclusion for Step 2**: The statement that HClO₄ is formed in the reaction between Cl₂ and H₂O is **incorrect**.

### Step 3: Analyze the Conjugate Bases
- **Conjugate Base of HClO₄**: When HClO₄ donates a proton (H⁺), it forms ClO₄⁻. ClO₄⁻ is a weak base because HClO₄ is a strong acid.

- **Conjugate Base of HClO**: When HClO donates a proton, it forms ClO⁻. ClO⁻ is a stronger base compared to ClO₄⁻ because HClO is a weaker acid than HClO₄.

**Conclusion for Step 3**: The conjugate base of HClO₄ (ClO₄⁻) is indeed a weaker base than the conjugate base of HClO (ClO⁻), making this statement **correct**.

### Step 4: Analyze the Acidity and Resonance
- HClO₄ is more acidic than HClO due to the resonance stabilization of its conjugate base (ClO₄⁻). The negative charge on ClO₄⁻ is delocalized over four oxygen atoms, making it more stable. In contrast, the conjugate base of HClO (ClO⁻) does not have such resonance stabilization.

**Conclusion for Step 4**: The statement that HClO₄ is more acidic than HClO due to resonance is **correct**.

### Final Conclusion
The incorrect statement about the oxoacids HClO₄ and HClO is **Option B**: "HClO₄ is formed in reaction between Cl₂ and H₂O."