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d-orbital splitting pattern in octahedral and tetrahedral fields

This type of question, asked 3 times: 5 Apr 2026 S1, 5 Apr 2026 S2, 6 Apr 2026 S1. All 3 questions below, oldest first.

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  1. Question 1

    5 Apr 2026 S1

    37
    Given below are two statements : Statement I : Each electron in ege_{g} orbitals destabilizes the orbitals by +0.6Δ0+ 0.6\Delta_{0} and each electron in the t2gt_{2g} orbitals stabilizes the orbitals by −0.4Δ0- 0.4\Delta_{0} 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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  2. Question 2

    5 Apr 2026 S2

    35
    Given below are two statements : Statement-I : Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomization. Statement-II : dxy=dxz=dyz<dx2−y2=dz2d_{xy} = d_{xz} = d_{yz} < d_{x^{2} - y^{2}} = d_{z^{2}} and dx2−y2=dz2<dxy=dxz=dyzd_{x^{2} - y^{2}} = d_{z^{2}} < d_{xy} = d_{xz} = d_{yz} are the d-orbital splitting in [Fe(H2O)6]3+\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{3 +} and [Ni(Cl)4]2−\left\lbrack Ni(Cl)_{4} \right\rbrack^{2 -} complex ions respectively. In the light of the above statements, choose the correct answer from the options given below:

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  3. Question 3

    6 Apr 2026 S1

    37
    Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex ? (A) dxy=dxz>dx2−y2d_{xy} = d_{xz} > d_{x^{2} - y^{2}} (B) dxy=dyz>dz2d_{xy} = d_{yz} > d_{z^{2}} (C) dx2−y2>dz2>dxzd_{x^{2} - y^{2}} > d_{z^{2}} > d_{xz} (D) dx2−y2=dz2<dxzd_{x^{2} - y^{2}} = d_{z^{2}} < d_{xz} Choose the correct answer from the options given below :

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