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Question:

The AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by the As atoms for bonding are:

dx2−y2,dz2,px,py

dx2−y2,s,px,py

dxy,s,px,py,pz

s,px,py,pz,dz2

Solution:

AsF5 has sp3d hybridization. In sp3d hybridization, the dz2 orbital is used along with the 's' and three 'p' orbitals to form three equatorial bonds and two equally strong axial bonds for a trigonal bipyramidal geometry. Hence, option D is correct.