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MCQ
Which of the following describes the Jahn-Teller effect?
Chemistry
A All octahedral complexes are perfectly symmetric
B Degenerate electronic states cause geometric distortion to remove degeneracy
C Tetrahedral complexes are always more stable than octahedral
D Crystal field splitting is always the same for all metals
Explanation

The Jahn-Teller theorem states that any non-linear molecule with a degenerate electronic ground state will undergo geometric distortion to remove the degeneracy and lower the energy.

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