Chemistry-Crystal Field Theory

NEET Chemistry Crystal Field Theory MCQ Question

Type: MCQ-diagram based-Easy-Class 12

Consider a diagram illustrating the crystal field splitting in an octahedral complex. If the splitting energy is denoted as Δo\Delta_o, which of the following correctly describes the energy change for the t2gt_{2g} orbitals?

Question diagram
A

The t2gt_{2g} orbitals decrease in energy by 25Δo\frac{2}{5} \Delta_o.

B

The t2gt_{2g} orbitals increase in energy by 25Δo\frac{2}{5} \Delta_o.

C

The t2gt_{2g} orbitals decrease in energy by Δo\Delta_o.

D

The t2gt_{2g} orbitals increase in energy by Δo\Delta_o.

Correct Answer

Option A

Detailed Explanation

In an octahedral complex, the t2gt_{2g} orbitals decrease in energy by 25Δo\frac{2}{5} \Delta_o as a result of crystal field splitting. This is mentioned in the NCERT context.

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