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Question

Which of the following have state of hybridization of the central atom not same as in the others?

A
B in BF3
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B
O in H3O+
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C
N in NH3
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D
P in PCl3
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Solution

The correct option is C B in BF3
In BF3, the ground state electronic configuration of Boron is 1s22s22Px1. excited state electronic configuration
is 1s22s12Px12Py1

One electron from one s orbital and two electrons from p orbital overlaps with p orbital electrons of Flourine to form three sp2 hybridised bonds. So, BF3 has sp2 hybridisation.
Flourine (a)
But in H3O+,NH3 and PCl3, the hybridisation involves one electron from s orbital, 3 electrons for p orbitals in central orbital forming sp3 hybridisation.

983558_1054662_ans_1e4da31784464ae1b2556c1eaa74d636.png

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