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Which one of the following pairs is isostructural – same shape and hybridization

Which one of the following pairs is isostructural (i.e., having the same shape and hybridization)?

Options

(a) [BCl₃ and BrCl₃⁻]
(b) [NH₃ and NO₃⁻]
(c) [NF₃ and BF₃]
(d) [BF₄⁻ and NH₄⁻]

Correct Answer:

[BF₄⁻ and NH₄⁻]

Explanation:

BF₄⁻ hybridization sp³, tetrahedral struacture. NH₄⁺ hybridization sp³, tetrahedral structure.

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