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Chemical Bonding and Molecular Structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryChemical Bonding and Molecular Structure1 Mark
Question
What is the type of hybrid orbitals associated with B atom in $\text{B}^-_4.$
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Answer

'B'in $\text{BH}^-_4$ is $\text{sp}^3$ hybridised because vacant $2\text{p}_\text{z}$ orbital of boron takes part in hybridisation and accepts a pair of electron from $\text{H}^-$ ion.

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