Vsepr & Hybridisation
Which factor most strongly increases ionic character in a bond?
Select the correct option:
Solution
Large electronegativity difference
- Bond Nature: No bond is purely ionic or purely covalent (except homonuclear diatomics like H2).
- Electronegativity (χ): The ability of an atom to attract electrons towards itself in a bond.
- Electron Transfer: If one atom is much more electronegative than the other, it effectively 'pulls' the electron pair towards its side, creating partial charges (δ+,δ−).
- Rule of Thumb: As Δχ increases, the displacement of electrons increases. A difference >1.7 typically indicates >50% ionic character.
- Conclusion: Large electronegativity difference is the primary driver of ionicity.
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About This Question
- Subject
- chemistry
- Chapter
- chemical bonding and molecular structure
- Topic
- vsepr & hybridisation
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Large electronegativity difference
- Bond Nature: No bond is purely ionic or purely covalent (except homonuclear diatomics like H2).
- Electronegativity (χ): The ability of an atom to attract electrons towards itself in a bond.
- Electron Transfer: If one atom is much more electronegative than the other, it effectively 'pulls' the electron pair towards its side, creating partial charges (δ+,δ−).
- Rule of Thumb: As Δχ increases, the displacement of electrons increases. A difference >1.7 typically indicates >50% ionic character.
- Conclusion: Large electronegativity difference is the primary driver of ionicity.
This easy difficulty chemistry question is from the chapter chemical bonding and molecular structure, covering the topic of vsepr & hybridisation. It appeared in the 2025 exam.
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