Question

The bond angle in CH₄ molecule is

• A. \(104\degree \ 31'\)
• B. \(109\degree \ 28'\)
• C. \(180\degree\)
• D. \(120\degree\)

Answer 1

The Correct Option is B

To solve the problem, we need to determine the bond angle in a methane (\( CH_4 \)) molecule.

1. Molecular Structure of \( CH_4 \):
Methane has a tetrahedral molecular geometry. The carbon atom is at the center, with four hydrogen atoms symmetrically arranged around it.

2. VSEPR Theory:
According to the Valence Shell Electron Pair Repulsion (VSEPR) theory, in a tetrahedral geometry, the electron pairs around the central atom repel each other and arrange themselves as far apart as possible. This results in a bond angle of approximately \( 109^\circ 28' \).

3. Common Bond Angles for Comparison:
- \( 104^\circ 31' \): Typical of bent molecules like \( H_2O \)
- \( 109^\circ 28' \): Tetrahedral geometry (as in \( CH_4 \)) ✅
- \( 120^\circ \): Trigonal planar geometry
- \( 180^\circ \): Linear geometry

Final Answer:
The bond angle in \( CH_4 \) molecule is \({109^\circ 28'} \).