The number of axial hydrogen atoms in chair form of cyclohexane is

Options

A. 3
B. 6
C. 12
D. 2

Answer

To determine the number of axial hydrogen atoms in the chair form of cyclohexane, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Cyclohexane**:
- Cyclohexane has a chair conformation that minimizes steric strain. In this conformation, the carbon atoms are arranged in a way that allows for two types of hydrogen atoms: axial and equatorial.

2. **Identify Axial and Equatorial Hydrogens**:
- Axial hydrogens are those that are oriented perpendicular to the plane of the ring (up or down), while equatorial hydrogens are oriented parallel to the plane of the ring.

3. **Count the Carbon Atoms**:
- Cyclohexane has 6 carbon atoms in its ring structure.

4. **Determine the Number of Axial Hydrogens**:
- Each carbon in the chair form of cyclohexane has one axial hydrogen. Since there are 6 carbon atoms, there will be 6 axial hydrogens.

5. **Final Answer**:
- Therefore, the number of axial hydrogen atoms in the chair form of cyclohexane is **6**.