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MCQ
Which rule governs the splitting of d-orbitals in an octahedral crystal field?
Chemistry
A Aufbau principle
B t2g (lower) and eg (higher) splitting
C Hund\'s rule only
D Pauli exclusion principle
Explanation

In an octahedral field, the five d-orbitals split into two sets: t2g (dxy, dxz, dyz, lower energy) and eg (dz2, dx2-y2, higher energy), separated by Delta_o.

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