Basicity of sulphurous acid and sulphuric acid are

Options

A. `2, 2`
B. `1, 2`
C. `2,1`
D. `1, 1`

Explanation

To determine the basicity of sulfurous acid (H₂SO₃) and sulfuric acid (H₂SO₄), we need to analyze their structures and count the number of acidic hydrogens present in each.

### Step-by-Step Solution:

1. **Identify the Chemical Formulas**:
- Sulfurous acid: H₂SO₃
- Sulfuric acid: H₂SO₄

2. **Draw the Structures**:
- **Sulfurous Acid (H₂SO₃)**:
- The structure consists of a sulfur atom bonded to three oxygen atoms, with one of the oxygen atoms having a hydroxyl group (–OH).
- The structure can be represented as:
```
O
||
HO-S-O
|
O
```
- In this structure, there are two hydroxyl groups (–OH), which means there are two acidic hydrogens.

- **Sulfuric Acid (H₂SO₄)**:
- The structure consists of a sulfur atom bonded to four oxygen atoms, with two of the oxygen atoms being part of hydroxyl groups (–OH).
- The structure can be represented as:
```
O
||
HO-S-O
|
O
|
O
```
- Similar to sulfurous acid, sulfuric acid also has two hydroxyl groups (–OH), which means it also has two acidic hydrogens.

3. **Determine the Basicity**:
- Basicity is defined as the number of acidic hydrogens in the acid.
- For sulfurous acid (H₂SO₃), the basicity is 2 (from the two –OH groups).
- For sulfuric acid (H₂SO₄), the basicity is also 2 (from the two –OH groups).

4. **Conclusion**:
- The basicity of sulfurous acid is 2, and the basicity of sulfuric acid is also 2.
- Therefore, the basicity of sulfurous acid and sulfuric acid are 2 and 2, respectively.

### Final Answer:
The basicity of sulfurous acid and sulfuric acid are 2, 2.

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