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Which pair of species has an interatomic bond angle of 109° 28′?
- NH₃, BF₄⁻
- NH₄⁺, BF₃
- NH₃, BF₃
- NH₄⁺, BF₄⁻
Correct answer: NH₄⁺, BF₄⁻
Solution
The interatomic bond angle of 109° 28′ is characteristic of tetrahedral molecular geometry, which is exhibited by both NH₄⁺ and BF₄⁻ due to their four bonding pairs of electrons and no lone pairs.
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