Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option. [Atomic Number: Fe = 26 , Mn = 25 , Co = 27 ] List I List II P t 2 g 6 e g 0

Question

Match the electronic configurations in List-I with appropriate metal complex ions in List-II and choose the correct option.

[Atomic Number: $Fe = 26, Mn = 25, Co = 27$ ]

	List I		List II
$P$	$t_{2 g}^{6} e_{g}^{0}$	$1$	${[Fe {(H_{2} O)}_{6}]}^{2 +}$
$Q$	$t_{2 g}^{3} e_{g}^{2}$	$2$	${[Mn {(H_{2} O)}_{6}]}^{2 +}$
$R$	$e^{2} t_{2}^{3}$	$3$	${[Co {({NH}_{3})}_{6}]}^{3 +}$
$S$	$t_{2 g}^{4} e_{g}^{2}$	$4$	${[{FeCl}_{4}]}^{-}$
		$5$	${[{CoCl}_{4}]}^{2 -}$

TestHub · Accepted Answer

In the complex Fe H 2 O 6 2 + the electronic configuration of Fe 2 + is Ar 3 d 6 . H 2 O is a weak ligand. Hence, the crystal filed splitting can be shown as follows, In the complex Mn H 2 O 6 2 + the electronic configuration of Mn 2 + is Ar 3 d 5 . H 2 O is a weak ligand. Hence, the crystal filed splitting can be shown as follows, In the complex Co NH 3 6 3 + the electronic configuration of Fe 3 + is Ar 3 d 6 . NH 3 is a strong filed ligand. Hence, the crystal filed splitting can be shown as follows, In the complex FeCl 4 - the electronic configuration of Fe 3 + is Ar 3 d 5 . Cl - is a weak ligand. Hence, the crystal filed splitting can be shown as follows, In the complex CoCl 4 2 - the electronic configuration of Co 2 + is Ar 3 d 7 . Cl - is a weak ligand. Hence, the crystal filed splitting can be shown as follows,

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