Crystal Field Theory Quiz

What is the main assumption of Crystal Field Theory regarding ligands?

• Ligands are treated as point charges.

• Ligands have no effect on metal orbitals.

• Ligands are always neutral.

• Ligands do not interact with metal ions.

What happens to the degeneracy of d-orbitals in an octahedral complex?

• It is maintained.

• It is lifted.

• It is doubled.

• It is halved.

In an octahedral complex, how many ligands typically surround the metal ion?

• Four

• Five

• Six

• Seven

What is the effect of ligand approach on the energy of d-orbitals?

• It lowers the energy of all d-orbitals.

• It raises the energy of some d-orbitals.

• It has no effect on d-orbitals.

• It raises the energy of all d-orbitals.

What is the term used for the energy separation due to ligand presence in a definite geometry?

• Crystal Field Splitting

• Ligand Field Theory

• Orbital Degeneracy

• Metal-Ligand Interaction

What is the barycentre in the context of d-orbitals?

• The average energy of d-orbitals

• The highest energy level

• The lowest energy level

• The energy of free metal ions

In an octahedral field, which orbitals experience more repulsion?

• t2g orbitals

• eg orbitals

• All orbitals experience equal repulsion

• None of the above

What is the significance of the energy gap between t2g and eg orbitals?

• It determines the color of the complex.

• It indicates the stability of the complex.

• It affects the magnetic properties.

• All of the above.

What is the effect of a spherically symmetrical field on d-orbitals?

• It raises their energy.

• It lowers their energy.

• It maintains their degeneracy.

• It splits their energy levels.

What happens to the d-orbitals when ligands approach the central metal ion?

• They become degenerate.

• They experience repulsion.

• They lose their energy.

• They gain stability.