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प्रश्न
Identify the type of overlap present in H2. Explain diagrammatically.
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उत्तर
s–s σ overlap:
- The overlap between two half-filled s orbitals of two different atoms containing unpaired electrons with opposite spins is called s–s σ overlap.
e.g. Formation of H2 molecule by s–s σ overlap:
Hydrogen atom (Z = 1) has electronic configuration: 1s1.
The 1s1 orbitals of two hydrogen atoms overlap along the internuclear axis to form a σ bond between the atoms in the H2 molecule. - Diagram:
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संबंधित प्रश्न
Explain the formation of H2 molecule on the basis of valence bond theory.
Distinguish between sigma and pi bond.
Give reasons for need of Hybridization
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Give a reason for carbon is tetravalent in nature.
Complete the following Table.
| 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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2px and 2pz
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Which of the following statements is INCORRECT according to the valence bond theory?
