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Chemistry-Crystal Field Theory

NEET Chemistry Crystal Field Theory MCQ Question

Type: MCQ-numerical-Hard-Class 12

In an octahedral coordination compound, the energy of the e_g orbitals increases by a certain amount due to crystal field splitting. If the crystal field splitting energy Δo\Delta_o is 20,000 cm−1^{-1}, what is the energy increase for the e_g orbitals?

A

12,000 cm−1^{-1}

B

8,000 cm−1^{-1}

C

20,000 cm−1^{-1}

D

4,000 cm−1^{-1}

Correct Answer

Option A

Detailed Explanation

According to the crystal field theory, in an octahedral field, the energy of the e_g orbitals increases by 35Δo\frac{3}{5} \Delta_o. Thus, 35×20,000 cm−1=12,000 cm−1\frac{3}{5} \times 20,000 \text{ cm}^{-1} = 12,000 \text{ cm}^{-1}.

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