Question

The ability of d-block elements to form complexes is due to:

• A. Vacant low energy orbital to accept lone pair of electrons from ligands
• B. Small and highly charged ions
• C. Both A & B are correct
• D. None is correct

Answer 1

The correct option is C Both A & B are correct

d-block elements form a large number of complex compounds due to the comparatively smaller sizes of the metal ions, their high ionic charges and the availability of vacant $d-$orbitals for bond formation.
Hence, option (c) is the correct answer.