Question

State any four properties of d-block elements.

Hint:

Transition metals are best known for colour, variable oxidation states, and catalytic activity.

Answer 1

Step 1: Recall position.
d-block elements are transition metals, lying in groups 3–12. Their valence electrons enter the (n–1)d orbitals.
Step 2: Properties.
- Variable oxidation states due to similar energies of (n–1)d and ns orbitals. - Coloured compounds due to d–d electronic transitions. - Catalytic properties as they provide active sites and variable oxidation states. - Complex formation due to vacant d-orbitals and high charge density.
Step 3: Conclusion.
Thus, d-block elements have distinct properties like variable oxidation states, colour, catalysis, and complex formation.