Match List-I with List-II List-I (Complex) List-II (Hybridization) A Ni CO 4 I sp 3 B Ni CN 4 2 - II sp 3 d 2 C Co CN 6 3 - III d 2 sp 3 D CoF 6 3 - IV dsp 2 Choose the correct answer from the options given below

A - I , B - IV , C - III , D - II

A - IV , B - I , C - III , D - II

A - I , B - IV , C - II , D - III

A - IV , B - I , C - II , D - III

Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with cone HCl forms deep blue complex, Y which has a Z geometry. X , Y and Z , respectively, are

X = Co H 2 O 6 2 + , Y = CoCl 4 2 - , Z = Tetrahedral

X = Co H 2 O 6 2 + , Y = CoCl 6 3 - , Z = Octahedral

X = Co H 2 O 6 3 + , Y = CoCl 6 3 - , Z = Octahedral

X = Co H 2 O 4 Cl 2 + , Y = CoCl 4 2 - , Z = Tetrahedral

Match List I with List II: List I (Complexes) List II (Hybridisation) (A) Ni ( CO ) 4 I sp 3 (B) Cu NH 3 4 2 + II dsp 2 (C) Fe NH 3 6 2 + III sp 3 d 2 (D) Fe H 2 O 6 2 + IV d 2 sp 3

A – I, B– II, C – IV, D – III

A – II, B – I, C – III, D – IV

A – I, B – II, C – III, D – IV

A – II, B – I, C – IV, D – III

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 27 July 2022 Shift 2>Q 129

MEDIUM

JEE Main

IMPORTANT

Earn 100

Low oxidation state of metals in their complexes are common when ligands

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Important Questions on Coordination Compounds

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 28 July 2022 Shift 1>Q 130

Total number of relatively more stable isomer(s) possible for octahedral complex

[Cu {(en)}_{2} {(SCN)}_{2}]

will be____

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 28 July 2022 Shift 2>Q 131

Match List-I with List-II

	List-I (Complex)		List-II (Hybridization)
A	$Ni {(CO)}_{4}$	I	${sp}^{3}$
B	${[Ni {(CN)}_{4}]}^{2 -}$	II	${sp}^{3} d^{2}$
C	${[Co {(CN)}_{6}]}^{3 -}$	III	$d^{2} {sp}^{3}$
D	${[{CoF}_{6}]}^{3 -}$	IV	${dsp}^{2}$

Choose the correct answer from the options given below

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 29 July 2022 Shift 1>Q 132

{[Fe {(CN)}_{6}]}^{3 -}

should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is

(-)

_____

Δ_{0}

.

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 29 July 2022 Shift 2>Q 133

Octahedral complexes of copper

(II)

undergo structural distortion (Jahn-Teller). Which one of the given copper

(II)

complexes will show the maximum structural distortion?
(en-ethylenediamine;

H_{2} N - {CH}_{2} - {CH}_{2} - {NH}_{2}

)

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 29 July 2022 Shift 2>Q 134

Sum of oxidation state (magnitude) and coordination number of cobalt in $Na [Co (bpy) {Cl}_{4}]$ is

Question Image

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 24 January 2023 Shift 1>Q 135

The primary and secondary valencies of cobalt respectively in

[Co ({NH}_{3})_{5} Cl] {Cl}_{2}

are:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 24 January 2023 Shift 1>Q 136

The d-electronic configuration of

{[{CoCl}_{4}]}^{2 -}

in tetrahedral crystal field is

e^{m} t_{2}^{n}

. The sum of

m

and number of unpaired electrons is

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 24 January 2023 Shift 2>Q 137

Which of the following cannot be explained by crystal field theory?

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