Bond angle in alkenes is equal to

Options

A. `120^@ `
B. `109^@ 28'`
C. `180^@`
D. `60^@`

Answer

**Step-by-Step Solution:**

1. **Identify the Structure of Alkenes**: Alkenes are hydrocarbons that contain at least one carbon-carbon double bond (C=C). The general formula for alkenes is CnH2n.

2. **Understand the Geometry Around the Double Bond**: In alkenes, the carbon atoms involved in the double bond are sp² hybridized. This hybridization leads to a specific molecular geometry.

3. **Determine the Shape of Alkenes**: The arrangement of atoms around the sp² hybridized carbon atoms is trigonal planar. This means that the three substituents (the other carbon and the two hydrogens) are arranged in a plane around the carbon atom.

4. **Calculate the Bond Angle**: In a trigonal planar arrangement, the bond angles between the substituents are approximately 120 degrees. Therefore, the bond angle in alkenes is equal to 120 degrees.

5. **Conclusion**: The bond angle in alkenes is 120 degrees due to their trigonal planar geometry around the sp² hybridized carbon atoms.

**Final Answer**: The bond angle in alkenes is equal to 120 degrees.

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