JEE Advanced 2023 · Paper 1 · Chemistry Q15

ChemistryList match+3 / -1Question 49 of 51

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 → 1; Q → 4; R → 2; S → 3

P → 1; Q → 2; R → 4; S → 5

P → 3; Q → 2; R → 5; S → 1

P → 3; Q → 2; R → 4; S → 1

Answer and worked solution

Official answer: D

Complex	Metal ion	Field	Configuration
$\ce{[Fe(H2O)6]^2+}$	Fe(II) $d^6$	weak, octahedral	$t_{2g}^4e_g^2$
$\ce{[Mn(H2O)6]^2+}$	Mn(II) $d^5$	weak, octahedral	$t_{2g}^3e_g^2$
$\ce{[Co(NH3)6]^3+}$	Co(III) $d^6$	strong, octahedral	$t_{2g}^6e_g^0$
$\ce{[FeCl4]-}$	Fe(III) $d^5$	tetrahedral	$e^2t_2^3$
$\ce{[CoCl4]^2-}$	Co(II) $d^7$	tetrahedral	$e^4t_2^3$

P→3, Q→2, R→4, S→1.

JEE Advanced 2023 · Paper 1, Chemistry question 15