Carbon carbon double bond in alkene consists of

Options

A. Two sigma bond
B. one sigma bond and one sigma bond
C. two `pi` bonds`
D. none of the above

Answer

To solve the question "Carbon-carbon double bond in alkene consists of", we need to analyze the structure of a carbon-carbon double bond.

### Step-by-Step Solution:

1. **Understanding the Structure of Alkenes**:
- Alkenes are hydrocarbons that contain at least one carbon-carbon double bond (C=C).
- The double bond consists of two types of bonds: a sigma (σ) bond and a pi (π) bond.

2. **Formation of the Sigma Bond**:
- The sigma bond is formed by the head-on overlap of two sp² hybridized orbitals from each carbon atom.
- This bond is strong and allows for free rotation around the bond axis.

3. **Formation of the Pi Bond**:
- The pi bond is formed by the side-to-side overlap of the unhybridized p orbitals from each carbon atom.
- This bond is weaker than the sigma bond and restricts rotation around the double bond.

4. **Conclusion**:
- Therefore, a carbon-carbon double bond in alkenes consists of **one sigma bond and one pi bond**.

### Final Answer:
A carbon-carbon double bond in alkenes consists of **one sigma bond and one pi bond**.

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