STD 11 - 3. Classification of elements and periodicity in properties — NEET STD 11 Science — Question

$(a)$ Octahedral $Co(III)$ complexes with strong field ligands have very high magnetic moments

$(b)$ When $\Delta_{0}< P$, the $d-$electron configuration of $Co(III)$ in an octahedral complex is $t_{\text {eg }}^{4} e_{g}^{2}$

$(c)$ Wavelength of light absorbed by $\left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+}$ is lower than that of $\left[\mathrm{CoF}_{6}\right]^{3-}$

$(d)$ If the $\Delta_{0}$ for an octahedral complex of $\mathrm{Co}(\mathrm{III})$ is $18,000 \;\mathrm{cm}^{-1},$ the $\Delta_{\mathrm{t}}$ for its tetrahedral complex with the same ligand will be $16,000\;\mathrm{cm}^{-1}$

$(A)$ $\Delta S _{ x \rightarrow z}=\Delta S _{ x \rightarrow y}+\Delta S _{ y \rightarrow z}$

$(B)$ $w_{x \rightarrow z}=w_{x \rightarrow y}+w_{y \rightarrow z}$

$(C)$ $w_{x \rightarrow z \rightarrow z}=w_{x \rightarrow y}$

$(D)$ $\Delta S _{x \rightarrow y \rightarrow z}=\Delta S _{x \rightarrow y}$