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Bond angle in methane is 109?28? since the carbon atom is sp3 hybridised and all the H atoms form the vertices of a regular tetrahedral. We ask you to provide a convincing semi-mathematical reason based on geometry &/or energy arguments as to why the bond angle is 109?28?& the methane molecule 3-dimensional instead of the bond angle being a right angle which may have been possible if the methane molecule was planar and the 4 H atoms were at the vertices of a square with C atom at the center.


Bond angle in methane is 109?28? since the carbon atom is sp3 hybridised and all


the H atoms form the vertices of a regular tetrahedral. We ask you to provide a


convincing semi-mathematical reason based on geometry &/or energy arguments


as to why the bond angle is 109?28?& the methane molecule 3-dimensional instead


of the bond angle being a right angle which may have been possible if the methane


molecule was planar and the 4 H atoms were at the vertices of a square with C atom


at the center.


Grade:10

1 Answers

Chetan Mandayam Nayakar
312 Points
9 years ago

The geometry of the molecule should be such that the mutual angle between any two orbitals be as great as possible, because the electrostatic repulsion between any two orbitals makes the angle between them as large as possible in order to minimise potential energy and maximise stability of the molecule.

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