The following of `pie` and `sigma` bonds in touleneis repectively

Options

A. 3 and 6
B. 6 and 12
C. 3 and 10
D. 6 and 10

Answer

To determine the number of pi (π) and sigma (σ) bonds in toluene (C7H8), we will analyze its structure step by step.

### Step 1: Understand the Structure of Toluene
Toluene consists of a benzene ring (C6H5) with a methyl group (CH3) attached to it. The benzene ring is a cyclic structure with alternating double bonds.

### Step 2: Count the Pi Bonds
1. **Benzene Ring**: The benzene ring has 6 carbon atoms and contains 3 double bonds. Each double bond contributes 1 pi bond.
- Thus, the number of pi bonds in the benzene ring = 3.
2. **Methyl Group**: The methyl group (CH3) does not contribute any pi bonds since it only has single bonds.
3. **Total Pi Bonds**: Therefore, the total number of pi bonds in toluene = 3 (from the benzene ring).

### Step 3: Count the Sigma Bonds
1. **Benzene Ring**: Each carbon in the benzene ring is bonded to two other carbons and one hydrogen, contributing to sigma bonds.
- There are 6 carbon atoms in the benzene ring, contributing 6 σ bonds between the carbon atoms.
- Each carbon atom in the benzene ring is also bonded to one hydrogen atom, contributing an additional 6 σ bonds (one for each hydrogen).
- Total σ bonds from benzene = 6 (C-C) + 6 (C-H) = 12 σ bonds.
2. **Methyl Group**: The methyl group (CH3) has:
- 3 σ bonds between the carbon and the three hydrogen atoms.
- 1 σ bond between the methyl carbon and the benzene ring carbon.
- Total σ bonds from the methyl group = 3 (C-H) + 1 (C-C) = 4 σ bonds.
3. **Total Sigma Bonds**: Therefore, the total number of sigma bonds in toluene = 12 (from benzene) + 4 (from methyl) = 16 σ bonds.

### Final Count
- Total Pi Bonds in Toluene: **3**
- Total Sigma Bonds in Toluene: **16**

### Answer
The number of pi and sigma bonds in toluene is **3 and 16**, respectively.