The number of sigma and pi bonds in peroxydisulphuric acid are, respectively.

Options

A. 9 and 4
B. 11 and 4
C. 4 and 8
D. 4 and 9

Explanation

To determine the number of sigma and pi bonds in peroxydisulfuric acid (H2S2O8), we can follow these steps:

### Step 1: Write the Molecular Formula
The molecular formula for peroxydisulfuric acid is H2S2O8.

### Step 2: Draw the Lewis Structure
1. Identify the central atoms: Sulfur (S) and Oxygen (O).
2. The structure includes:
- Two sulfur atoms.
- Eight oxygen atoms, with some forming double bonds with sulfur and others involved in peroxy linkages (O-O).
3. The structure can be visualized as:
- Each sulfur atom is bonded to four oxygen atoms, two of which are involved in double bonds (S=O) and two in single bonds (S-O).
- There are also peroxy linkages (O-O) between some of the oxygen atoms.

### Step 3: Count the Bonds
1. **Single Bonds**: Count all the single bonds in the structure.
- Each single bond contributes one sigma bond.
- In the structure, there are 7 single bonds.

2. **Double Bonds**: Identify the double bonds.
- Each double bond contributes one sigma bond and one pi bond.
- In the structure, there are 4 double bonds.

### Step 4: Calculate Sigma and Pi Bonds
1. **Total Sigma Bonds**:
- From single bonds: 7 sigma bonds.
- From double bonds: 4 double bonds contribute 4 sigma bonds.
- Total sigma bonds = 7 (from single bonds) + 4 (from double bonds) = 11 sigma bonds.

2. **Total Pi Bonds**:
- Each double bond contributes 1 pi bond.
- Total pi bonds = 4 (from double bonds).

### Final Answer
The total number of sigma and pi bonds in peroxydisulfuric acid (H2S2O8) is:
- Sigma bonds = 11
- Pi bonds = 4

### Conclusion
The answer is 11 sigma bonds and 4 pi bonds.

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