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

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$d_{xy}, s, p_{x}, p_{y}, p_{z}$

$d_{x^{2} - y^{2}}, d_{z^{2}}, s, p_{x}, p_{y}$

$s, p_{x}, p_{y}, p_{z}, d_{z^{2}}$

$d_{x^{2} - y^{2}}, s, p_{x}, p_{y}$

answer is D.

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Detailed Solution

AsF₅ has sp³d hybridisation.

In sp³d hybridisation, the $d_{z^{2}}$ 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.

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