JEE Main 2026 — 23 January, Evening Shift — Question 50

(A) $\mathrm{Co}^{3+}:-3 \mathrm{~d}^{6}$ $\mathrm{NH}_{3} \Rightarrow$ S.F.L Hybridisation $\Rightarrow \mathrm{d}^{2} \mathrm{sp}^{3}$, Inner orbital complex (B) $\mathrm{Mn}^{3+}:-3 \mathrm{~d}^{4}$ $\mathrm{Cl}^{-} \Rightarrow$ W.F.L Hybridisation $\Rightarrow \mathrm{sp}^{3} \mathrm{~d}^{2}$, Outer orbital complex (C) $\mathrm{Co}^{3+}:-3 \mathrm{~d}^{6}$ $\mathrm{F}^{-} \Rightarrow$ W.F.L Hybridisation $\Rightarrow \mathrm{sp}^{3} \mathrm{~d}^{2}$, Outer orbital complex (D) $\mathrm{Fe}^{3+}:-3 \mathrm{~d}^{5}$ $\mathrm{F}^{-} \Rightarrow$ W.F.L Hybridisation $\Rightarrow \mathrm{sp}^{3} \mathrm{~d}^{2}$, Outer orbital complex (E) $\mathrm{Ni}^{2+}:-3 \mathrm{~d}^{8}$ $\mathrm{CN}^{-} \Rightarrow$ S.F.L Hybridisation ⇒ dsp ${ }^{2}$, Inner orbital complex