Crystal Field Theory - MCQ Quiz

In an octahedral complex, the d-orbitals split into:

• t2g (lower) and eg (higher)

• eg (lower) and t2g (higher)

• dz2 lower, others higher

• Equal energy levels

The CFSE for a high-spin d⁴ octahedral complex is:

• -1.6 Δo

• -0.6 Δo

• -0.4 Δo

• -1.2 Δo

The spectrochemical series arranges ligands according to:

• Oxidation state of metal

• Increasing Δ values

• Decreasing CFSE

• Atomic mass of ligand

Which ligand produces the largest crystal field splitting?

• I-

• F-

• CN-

• Cl-

For an octahedral d⁶ low-spin complex, CFSE is:

• -2.4 Δo + 2P

• -1.2 Δo + 2P

• -0.4 Δo

• 0

The factor that does not influence crystal field splitting is:

• Nature of ligand

• Oxidation state of metal

• Coordination number

• Melting point of ligand

The Jahn-Teller effect is significant for:

• d0 configuration

• d3 configuration

• d9 configuration

• d10 configuration

In a tetrahedral complex, the higher set of orbitals is:

• t2

• e

• t2g

• eg

Which is not true about high-spin octahedral complexes?

• Formed with weak field ligands

• Large Δo

• Maximum unpaired electrons

• Low CFSE

CFSE for a high-spin d5 octahedral complex is:

• 0

• -0.4 Δo

• -1.2 Δo

• -2.0 Δo