JEE Chemistry Practice Question

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option. [Atomic Number: $\mathrm{Fe}=26, \mathrm{Mn}=25$, $\mathrm{Co}=27$ ] List-I (P) $t_{2 g}^{6} e_{g}^{0}$ (Q) $t_{2 g}^{3} e_{g}^{2}$ (R) $\mathrm{e}^{2} \mathrm{t}_{2}^{3}$ (S) $t_{2 g}^{4} e_{g}^{2}$ List-II (1) $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ (2) $\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ (3) $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$ (4) $\left[\mathrm{FeCl}_{4}\right]^{-}$ (5) $\left[\mathrm{CoCl}_{4}\right]^{2-}$

1. A.$\mathrm{P} \rightarrow 1$; Q $\rightarrow 4$; $\mathrm{R} \rightarrow 2$; $\mathrm{S} \rightarrow 3$
2. B.$\mathrm{P} \rightarrow 1 ; \mathrm{Q} \rightarrow 2 ; \mathrm{R} \rightarrow 4 ; \mathrm{S} \rightarrow 5$
3. C.$\mathrm{P} \rightarrow 3 ; \mathrm{Q} \rightarrow 2 ; \mathrm{R} \rightarrow 5 ; \mathrm{S} \rightarrow 1$
4. D.$\mathrm{P} \rightarrow 3 ; \mathrm{Q} \rightarrow 2 ; \mathrm{R} \rightarrow 4$; $\mathrm{S} \rightarrow 1$