Chemistry · CHEMICAL BONDING AND MOLECULAR STRUCTURE

Consider the following statements regarding hybridisation involving d-orbitals: (A) \( \text{dsp}^2 \) hybridisation gives a square planar geometry as in \( [\text{Ni}(\text{CN})_4]^{2-} \). (B) \( \text{sp}^3\text{d} \) hybridisation gives a trigonal bipyramidal geometry as in \( \text{PCl}_5 \). (C) \( \text{sp}^3\text{d}^2 \) hybridisation gives an octahedral geometry as in \( \text{SF}_6 \). (D) Hybridisation involving \( 3p \), \( 3d \), and \( 4s \) orbitals is easily possible due to similar energies. How many of the above statements are correct?

1. A
   Only one
2. B
   Only two
3. C
   Only three
4. D
   All four