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Question

The sum of p orbitals involved in the hybridisation of NH3 and BF3 molecules are:

A
6
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B
5
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C
4
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D
3
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Solution

The correct option is B 5
In NH3, N is bonded to three H atoms and also has a lone pair. Thus,it is sp3 hybridised.
In BF3, B is bonded to three F atoms has no lone pair. Thus,it is sp2 hybridised.
The hybridisation of NH3 and BF3 are sp3 and sp2 respectively.
Hence,a total of 5 p orbitals are involved in the hybridisation of both the molecules.

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