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CFSE of a given octahedral complex

This type of question, asked 9 times: 2021 Paper 24, 27 Jun 2022, 29 Jul 2022, 10 Apr 2023, 12 Apr 2023, 22 Jan 2025, 2 Apr 2025, 4 Apr 2025, 21 Jan 2026 S2. All 9 questions below, oldest first.

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  1. Question 1

    2021 Paper 24

    38
    The Crystal Field Stabilization Energy (CFSE) and magnetic moment (spin-only) of an octahedral aqua complex of a metal ion (Mz+)\left( M^{z +} \right) are −0.8Δ0- 0.8\Delta_{0} and 3.87 BMBM, respectively. Identify (Mz+)\left( M^{z +} \right) :

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  2. Question 2

    27 Jun 2022

    41
    Which of the following will have maximum stabilization due to crystal field?

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  3. Question 3

    29 Jul 2022

    60
    [Fe(CN)6]3−\left\lbrack Fe(CN)_{6} \right\rbrack^{3 -} should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (-)_____ Δo\Delta_{o}. (Nearest integer)

  4. Question 4

    10 Apr 2023

    136
    Match List I with List II
    List I (Complex)List II (CFSE, in units of Δ0\Delta_{0})
    (A)
    [Ti(H2O)6]2+\left\lbrack Ti\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		(I)-1.2
    (B)
    [V(H2O)6]2+\left\lbrack V\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		(II)-0.6
    (C)
    [Mn(H2O)6]3+\left\lbrack Mn\left( H_{2}O \right)_{6} \right\rbrack^{3 +}
    		(III)0
    (D)
    [Fe(H2O)6]3+\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{3 +}
    		(IV)-0.8
    Choose the correct answer from the options given below:

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  5. Question 5

    12 Apr 2023

    35
    Match List I with List II
    List I (Complex)List II (CFSE, in units of Δ0\Delta_{0})
    (A)
    [Cu(NH3)6]2+\left\lbrack Cu\left( NH_{3} \right)_{6} \right\rbrack^{2 +}
    		(I)-0.6
    (B)
    [Ti(H2O)6]3+\left\lbrack Ti\left( H_{2}O \right)_{6} \right\rbrack^{3 +}
    		(II)-2.0
    (C)
    [Fe(CN)6]3−\left\lbrack Fe(CN)_{6} \right\rbrack^{3 -}
    		(III)-1.2
    (D)
    [NiF6]4−\left\lbrack NiF_{6} \right\rbrack^{4 -}
    		(IV)-0.4
    Choose the correct answer from the options given below:

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  6. Question 6

    22 Jan 2025

    41
    In which of the following complexes the CFSE, Δ0\Delta_{0} will be equal to zero?

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  7. Question 7

    2 Apr 2025

    102
    The d-orbital electronic configuration of the complex among [Co(en)3]3+, [CoF6]3−\left\lbrack Co(en)_{3} \right\rbrack^{3 +},\ \left\lbrack CoF_{6} \right\rbrack^{3 -}, [Mn(H2O)6]2+\left\lbrack Mn\left( H_{2}O \right)_{6} \right\rbrack^{2 +} and [Zn(H2O)6]2+\left\lbrack Zn\left( H_{2}O \right)_{6} \right\rbrack^{2 +} that has the highest CFSE is :

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  8. Question 8

    4 Apr 2025

    31
    Which one of the following complexes will have Δ0=0\Delta_{0}= 0 and μ=5.96\mu= 5.96 B.M.?

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  9. Question 9

    21 Jan 2026 S2

    38
    Given below are two statements: Statement I: Crystal Field Stabilization Energy (CFSE) of [Cr(H2O)6]2+\left\lbrack Cr\left( H_{2}O \right)_{6} \right\rbrack^{2 +} is greater than that of [Mn(H2O)6]2+\left\lbrack Mn\left( H_{2}O \right)_{6} \right\rbrack^{2 +}. Statement II: Potassium ferricyanide has a greater spin-only magnetic moment than sodium Ferrocyanide. In the light of the above statements, choose the correct answer from the options given below:

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