Match List I with List II LIST-I LIST-II --- --- --- --- A. K 2 [ Ni ( CN ) 4 ] I. sp 3 B. [ Ni ( CO ) 4 ] II. sp 3 \!\! \!\! d 2 C. [ C o 2 ( N H 3 ) 6 ] C l 3 III. dsp 2 D. N a 3 [ Co F 6 ] IV. d 2 s p 3 Choose the correct answer from the options given below:

Chemistry · Coordination Compounds

JEE Main 2024 — 9 April, Shift 2 — Question 60

Match List I with List II

LIST-I	LIST-II
A.	${{\text{K}}_{2}}\left[ \text{Ni}{{(\text{CN})}_{4}} \right]$	I.	sp ${{~}^{3}}$
B.	$\left[ \text{Ni}{{(\text{CO})}_{4}} \right]$	II.	sp ${{~}^{3}}\text{ }\!\!~\!\!\text{ }{{\text{d}}^{2}}$
C.	$\left[ \text{C}{{\text{o}}^{2}}{{\left( \text{N}{{\text{H}}_{3}} \right)}_{6}} \right]\text{C}{{\text{l}}_{3}}$	III.	dsp ${{~}^{2}}$
D.	$\text{N}{{\text{a}}_{3}}\left[ \text{Co}{{\text{F}}_{6}} \right]$	IV.	d ${{~}^{2}}\text{s}{{\text{p}}^{3}}$

Choose the correct answer from the options given below:

Option A:
A-III, B-I, C-II, D-IV
Option B:
A-III, B-II, C-IV, D-I
Option C:
A-I, B-III, C-II, D-IV
Option D:
A-III, B-I, C-IV, D-II
Correct

Answer: D

Step-by-step solution

A) $\mathrm{K}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$

$\mathrm{Ni}^{2+}:[\mathrm{Ar}] 3 \mathrm{~d}^{8} 4 \mathrm{~s}^{\mathrm{o}},\left(\mathrm{CN}^{-}\right.$ is S.F.L) Pre hybridization state of $\mathrm{Ni}^{+2}$

(B) $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$

$\mathrm{Ni}:[\mathrm{Ar}] 3 \mathrm{~d}^{8} 4 \mathrm{~s}^{2}$ CO is S.F.L, so pairing occur Pre hybridization state of Ni

$\mathrm{Co}^{+3}:[\mathrm{Ar}] 3 \mathrm{~d}^{6} 4 \mathrm{~s}^{0}$

With $\mathrm{Co}^{3+}, \mathrm{NH}_{3}$ act as S.F.L

(d) $\mathrm{Na}_{3}\left[\mathrm{CoF}_{6}\right]$

$\mathrm{Co}^{3+}:[\mathrm{Ar}] 3 \mathrm{~d}^{6}\left(\mathrm{~F}^{\Theta}:\right.$ W.F.L $)$

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 9 April, Shift 2
Subject: Chemistry
Chapter: Coordination Compounds
Topic: Theories of Bonding in Coordination Compounds

The coordination environment of Ca^2+ ion in its complex with EDTA ^4 is :

Answer: D

Step-by-step solution

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