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JEE Main20241 Feb 2024Morning ShiftChemistryChemical Bonding and Molecular StructureActual

The number of molecules/ion/s having trigonal bipyramidal shape is …….. . PF 5 , BrF 5 , PCl 5 , PtCl 4 2 - , BF 3 , Fe ( CO ) 5

Correct answer

3

Step-by-step solution

PF 5 involves sp 3 d hybridisation and hence has trigonal bipyramidal structure. In PCl 5 the central atom is surrounded by five bond pairs and no lone paris. Hybridisation of central atom in PCl 5 molecule is sp 3 d giving trigonal bipyramidal shape. In Fe ( CO ) 5 , oxidation state of CO is zero. It has hybridisation =dsp 3 . So it has trigonal bipyramidal geometry. BrF 5 ; square pyramidal PtCl 4 - 2 ; square planar BF 3 ; Trigonal planar. Hence the answer is 3

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