JEE Main 2025 — 8 April, Evening Shift — Question 13

(i) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$

$$\mathrm{Co}^{3+} \Rightarrow 3 \mathrm{~d}^{6} ; \mathrm{t}_{2 \mathrm{~g}}{ }^{6} \mathrm{e}_{\mathrm{g}}{ }^{0} \mathrm{~d}^{2} \mathrm{sp}^{3} \text { hybridisation }$$

(ii)

$\mathrm{sp}^{3} \mathrm{~d}^{2}$ hybridisation

(iii) $\left[\mathrm{CrF}_{6}\right]^{3-}$

$\mathrm{Cr}^{3+} \Rightarrow 3 \mathrm{~d}^{3} ; \mathrm{t}_{2 \mathrm{~g}}{ }^{3} \mathrm{e}^{90} \mathrm{~d}^{2} \mathrm{sp}^{3}$ hybridisation

(iv) $\left[\mathrm{CoF}_{6}\right]^{3-}$

$\mathrm{Co}^{3+} \Rightarrow 3 \mathrm{~d}^{6} ; \mathrm{t} 2 \mathrm{~g}^{4} \mathrm{eg}^{2} \mathrm{sp}^{3} \mathrm{~d}^{2}$ hybridisation

(v) $[\mathrm{Mn}(\mathrm{CN})]^{3-}$

$\mathrm{Mn}^{3+} \Rightarrow 3 \mathrm{~d}^{4} ; \mathrm{t}_{2 \mathrm{~g}}{ }^{4} \mathrm{e}_{\mathrm{g}}{ }^{0} \mathrm{~d}^{2} \mathrm{sp}^{3}$ hybridisation

(vi) $\left[\mathrm{MnCl}_{6}\right]^{3-}$

$\mathrm{Mn}^{3+} \Rightarrow 3 \mathrm{~d}^{4} ; \mathrm{t}_{2 \mathrm{~g}}{ }^{3} \mathrm{e}_{\mathrm{g}}{ }^{1} \mathrm{sp}^{3} \mathrm{~d}^{2}$ hybridisation