Among the statements $(a - d)$ , the incorrect ones are:

Option 1 - Octahedral <math> <mi mathvariant="normal">C</mi> <mi mathvariant="normal">o</mi> </math>  (III) complexes with strong field ligands have very high magnetic moments

Option 2 - When <math> <msub> <mrow> <mrow> <mi mathvariant="normal">Δ</mi> </mrow> </mrow> <mrow> <mrow> <mn>0</mn> </mrow> </mrow> </msub> <mo><</mo> <mi mathvariant="normal">P</mi> </math> , the d-electron configuration of <math> <mi mathvariant="normal">C</mi> <mi mathvariant="normal">o</mi> </math> (III) in an octahedral complex is <math> <msubsup> <mrow> <mrow> <mi mathvariant="normal">t</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">e</mi> <mi mathvariant="normal">g</mi> </mrow> </mrow> <mrow> <mrow> <mn>4</mn> </mrow> </mrow> </msubsup> <msubsup> <mrow> <mrow> <mi mathvariant="normal">e</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">g</mi> </mrow> </mrow> <mrow> <mrow> <mn>2</mn> </mrow> </mrow> </msubsup> </math>

Option 3 - Wavelength of light absorbed by <math> <msup> <mrow> <mrow> <mfenced open="[" close="]" separators="|"> <mrow> <mrow> <mi mathvariant="normal">C</mi> <mi mathvariant="normal">o</mi> <mo>(</mo> <mi mathvariant="normal">e</mi> <mi mathvariant="normal">n</mi> <msub> <mrow> <mrow> <mo>)</mo> </mrow> </mrow> <mrow> <mrow> <mn>3</mn> </mrow> </mrow> </msub> </mrow> </mrow> </mfenced> </mrow> </mrow> <mrow> <mrow> <mn>3</mn> <mo>+</mo> </mrow> </mrow> </msup> </math> is lower than that of <math> <msup> <mrow> <mrow> <mfenced open="[" close="]" separators="|"> <mrow> <mrow> <msub> <mrow> <mrow> <mi mathvariant="normal">C</mi> <mi mathvariant="normal">o</mi> <mi mathvariant="normal">F</mi> </mrow> </mrow> <mrow> <mrow> <mn>6</mn> </mrow> </mrow> </msub> </mrow> </mrow> </mfenced> </mrow> </mrow> <mrow> <mrow> <mn>3</mn> <mo>-</mo> </mrow> </mrow> </msup> </math>

Option 4 - If the <math> <msub> <mrow> <mrow> <mi mathvariant="normal">Δ</mi> </mrow> </mrow> <mrow> <mrow> <mn>0</mn> </mrow> </mrow> </msub> </math> for an octahedral complex of <math> <mi mathvariant="normal">C</mi> <mi mathvariant="normal">o</mi> </math> (III) is <math> <mn>18,000</mn> <msup> <mrow> <mrow> <mtext> </mtext> <mi mathvariant="normal">c</mi> <mi mathvariant="normal">m</mi> </mrow> </mrow> <mrow> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mrow> </msup> </math> , the <math> <msub> <mrow> <mrow> <mi mathvariant="normal">Δ</mi> </mrow> </mrow> <mrow> <mrow> <mi mathvariant="normal">t</mi> </mrow> </mrow> </msub> </math> for its tetrahedral complex with the same ligand will be <math> <mn>16,000</mn> <msup> <mrow> <mrow> <mtext> </mtext> <mi mathvariant="normal">c</mi> <mi mathvariant="normal">m</mi> </mrow> </mrow> <mrow> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </mrow> </msup> </math>

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Answered by

Alok Kumar Singh | Contributor-Level 10

7 months ago

Correct Option - 4

Detailed Solution:

In strong ligand field ${C o}^{3 +}$ will have $t_{2 g}^{6} e_{g}^{0}$ of configuration and $Δ t = \frac{4}{9} Δ_{0}$