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Question

Which of the following molecules is not tetrahedral ?

A
CF4
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B
SF4
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C
CH4
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D
SiF4
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Solution

The correct option is B SF4
CF4,CH4,SiF4 molecule's geometry is tetrahedral. Because they don't have any lone pair of electrons. In case of SF4 central atom sulfur contain one lone pair of electron so deviation occur in the structure and form see saw type of geometry.

Image result for sf4 structure
SF4(seesaw)


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