Choose the incorrect order for acidic strength.

Options

A. `CO_2 gt CO`
B. `SO_2 gt SO_3`
C. `HClO_2 gt HOCl`
D. `SiO_2 gt CO_2`

Answer

To determine the incorrect order of acidic strength from the given compounds, we will analyze the acidic properties of each compound step-by-step.

### Step 1: Analyze CO2 and CO
- **Oxidation States**: In CO2, carbon has an oxidation state of +4 (C: +4, O: -2). In CO, carbon has an oxidation state of +2 (C: +2, O: -2).
- **Acidity**: CO2 is more acidic than CO because it has a higher oxidation state, which means it has a greater tendency to accept electrons.

### Step 2: Analyze SO2 and SO3
- **Oxidation States**: In SO2, sulfur has an oxidation state of +4, while in SO3, sulfur has an oxidation state of +6.
- **Acidity**: SO3 is more acidic than SO2 due to the higher oxidation state of sulfur in SO3, which allows it to accept more electrons.

### Step 3: Analyze HClO2 and HOCl
- **Oxidation States**: In HClO2, chlorine has an oxidation state of +3, while in HOCl, chlorine has an oxidation state of +1.
- **Acidity**: HClO2 is more acidic than HOCl because of the higher oxidation state of chlorine in HClO2.

### Step 4: Analyze SiO2 and CO2
- **Oxidation States**: Both SiO2 and CO2 have silicon and carbon in the +4 oxidation state, respectively.
- **Acidity**: However, CO2 is more acidic than SiO2. This is because carbon is more electronegative than silicon, leading to a greater tendency for CO2 to accept electrons.

### Conclusion
Based on the analysis:
- The correct order of acidic strength is: CO2 > SO3 > HClO2 > SiO2
- The incorrect order would be any arrangement that contradicts this conclusion.