Given below are two statements: Statement I: Each electron in e_g orbitals destabilizes the orbitals by +0.6 _o and each electron in the t_ 2g orbitals stabilizes the orbitals by -0.4 _o in an octahedral field on the basis of crystal field theory. Statement II: All the d-orbitals of the transition m

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Given below are two statements: Statement I: Each electron in e_g orbitals destabilizes the orbitals by +0.6 _o and each electron in the t_ 2g orbitals stabilizes the orbitals by -0.4 _o in an octahedral field on the basis of crystal field theory. Statement II: All the d-orbitals of the transition metals have the same energy in their free atomic state but when a complex is formed the ligands destroy the degeneracy of these orbitals on the basis of crystal field theory. In the light of the above statements, choose the correct answer from the options given below

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Correct answer: A. Both Statement I and Statement II are correct

In an octahedral crystal field, the five degenerate d-orbitals split into two sets: a lower energy t_ 2g set and a higher energy e_g set. The energy of the t_ 2g orbitals is lowered by 0.4 _o (stabilization of -0.4 _o) and the energy of the e_g orbitals is raised by 0.6 _o (destabilization of +0.6 _o) relative to the barycenter. Hence, Statement I is correct. In the free atomic or ionic state, all five d-orbitals of a transition metal are degenerate (have the same energy). When ligands approach the central metal ion to form a complex, the spherically symmetrical field is disrupted, which destroys the degeneracy of the d-orbitals and causes them to split. Hence, Statement II is correct. Both Statement I and Statement II are correct. Answer: Both Statement I and Statement II are correct

JEE Main Chemistry Question (2026) — Solution

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