If the compound phosphorus pentaiodide (PI5) has no lone pairs, it would take the shape of a Trigonal bipyramid. The correct option is C.
Phosphorus pentaiodide is an inorganic compound. It was claimed to be discovered in the 1900s, but it is still disputed because the size of the iodine atom is very large, and it can not be attached to one phosphorus. Its formula is PI₅.
A trigonal bipyramid is a shape that has three sides like a triangle. It is made when two pyramids are joined with their base. So, bipyramid means two pyramids and trigonal because of three sides.
If phosphorus pentaiodide exists, then it will be trigonal bipyramid shaped.
Thus, the correct option is C. Trigonal bipyramid.
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