The p-Block Elements — Chemistry STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements2 Marks
Question
Why is $\mathrm{BF}_3$ planar molecule but $\mathrm{NH}_3$ is pyramidal?
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Answer
In $\mathrm{BF}_3$ ' B ' is $\mathrm{sp}^2$ hybridised whereas in $\mathrm{NH}_3{ }^{\prime} \mathrm{N}^{\prime}$ is $\mathrm{sp}^3$ hybridised with one lone pair of electrons, therefore, it is pyramidal while $\mathrm{BF}_3$ is planar.
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