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Question

In which of the following molecules the central atom does not have sp3 hybridization:

A
SF4
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B
BF4
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C
NH+4
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D
CH4
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Solution

The correct option is A SF4

In SF4,
Total number of electrons around S=6+4=10
Number of bond pairs=4
Number of lone pairs=1
steric number=5
So hybridization of sulphur here is sp3d
In BF4
Total number of electrons around S=3+4+1=8
Number of bond pairs=4
Number of lone pairs=0
steric number=4
So hybridization of boron here is sp3
In NH+4
Total number of electrons around N=5+41=8
Number of bond pairs=4
Number of lone pairs=0
Steric number=4
So hybridization of nitrogen here is sp3
In CH4
Total number of electrons around N=4+4=8
Number of bond pairs=4
Number of lone pairs=0
Steric number=4
So hybridization of carbon here is sp3


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