Question

Which of the $d$ -orbital is used in $sp^3d$ hybridisation?

• A. $d_{xy}$
• B. $d_{x^2-y^2}$
• C. $d_{z^2}$
• D. $d_{yz}$

Answer 1

Answer: (C)

$d_{z^2}$

Answer 2

The hybridisation of one $s$, one $d$ and three $p$-orbitals on a central atom gives rise to five $sp^3d$ orbitals, three equatorial and two axial. This hybridisation uses one $d_z^2$, one $s$ and all three of the $p$ orbitals and shape of the molecule becomes trigonal bipyramidal.