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प्रश्न
Give a reason for the sigma (σ) bond is stronger than the Pi (π) bond.
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उत्तर
- The strength of the bond depends on the extent of overlap of the orbitals. Greater the overlap, the stronger is the bond.
- A sigma bond is formed by the coaxial overlap of the atomic orbitals which are oriented along the internuclear axis, hence the extent of overlap is maximum.
- A pi bond is formed by the lateral overlap of the atomic orbitals which are oriented perpendicular to the internuclear axis, hence the extent of orbital overlapping in a sidewise manner is less.
Hence, the sigma (σ) bond is stronger than the Pi (π) bond.
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संबंधित प्रश्न
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| Molecule | Type of Hybridization | Type of bonds | Geometry | Bond angle |
| CH4 | - | 4C-H 4σ bonds |
Tetrahedral | - |
| NH3 | sp3 | 3N-H 3σ bonds 1 lone pair |
- | - |
| H2O | - | - | angular | 104.5° |
| BF3 | sp2 | - | - | 120° |
| C2H4 | - | - | - | 120° |
| BeF2 | - | 2 Be-F | Linear | - |
| C2H2 | sp | (3σ+2π) 1C-C σ 2C-H σ 2C-C π |
- | - |
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| List-I | List-II | ||
| (A) | PCl5 | (i) | Square pyramidal |
| (B) | SF6 | (ii) | Trigonal planar |
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