JEE Main 2025 — Chemistry Inorganic Chemistry

In $\left[\mathrm{Co}\left(\mathrm{NH}_3\right]_6\right]^{3+}, \mathrm{Co}^{+3}:[\mathrm{Ar}] 3 \mathrm{~d}^6, \mathrm{NH}_3$[Co(NH3​]6​]3+,Co+3:[Ar]3 d6,NH3​ is S.F.L

Hybridisation state of $\mathrm{Co}^{3+}$Co3+ is $\mathrm{d}^2 \mathrm{sp}^3$d2sp3

In $\mathrm{SF}_6$SF6​, Hybridisation state of sulphur is $\mathrm{sp}^3 \mathrm{~d}^2$sp3 d2

In $\left[\mathrm{CrF}_6\right]^{3-}, \mathrm{Cr}^{+3}:[\mathrm{Ar}] 3 \mathrm{~d}^3$[CrF6​]3−,Cr+3:[Ar]3 d3

Hybridisation state of $\mathrm{Cr}^{3+}$Cr3+ is $\mathrm{d}^2 \mathrm{sp}^3$d2sp3

$\left[\mathrm{CoF}_6\right]^{3-}, \mathrm{Co}^{+3}:[\mathrm{Ar}] 3 \mathrm{~d}^6 \mathrm{~F}^{-}$[CoF6​]3−,Co+3:[Ar]3 d6 F−is W.F.L

Hybridisation state of $\mathrm{Co}^{3+}$Co3+ is $\mathrm{sp}^3 \mathrm{~d}^2$sp3 d2

$\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}, \mathrm{Mn}^{+3}:[\mathrm{Ar}] 3 \mathrm{~d}^4 \mathrm{CN}^{-}$[Mn(CN)6​]3−,Mn+3:[Ar]3 d4CN−is S.F.L Hybridisation state of $\mathrm{Mn}^{3+}$Mn3+ is $\mathrm{d}^2 \mathrm{sp}^3$d2sp3

$\left[\mathrm{MnCl}_6\right]^{3-}, \mathrm{Mn}^{+3}:[\mathrm{Ar}] 3 \mathrm{~d}^4 \mathrm{Cl}^{-}$[MnCl6​]3−,Mn+3:[Ar]3 d4Cl−is W.F.L

Hybridisation state of $\mathrm{Cl}^{-}$Cl−is $\mathrm{sp}^3 \mathrm{~d}^2$sp3 d2

Total number of $\mathrm{sp}^3 \mathrm{~d}^2$sp3 d2 hybridized molecules is 3