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

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IMPORTANT

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The denticity of an organic ligand, biuret is :

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Important Questions on Coordination Compounds

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 3 September 2020 Shift 2>Q 50

The d-electron configuration of

[Ru (en)_{3}] {Cl}_{2}

, and

[Fe {(H_{2} O)}_{6}] {Cl}_{2}

respectively are:

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 3 September 2020 Shift 1>Q 51

The electronic spectrum of

{[Ti {(H_{2} O)}_{6}]}^{3 +}

shows a single broad peak with a maximum at

20, 300 {cm}^{- 1} .

The crystal field stabilization energy (CFSE) of the complex ion, in

{kJmol}^{- 1},

is :

(1 {kJmol}^{- 1} = 83.7 {cm}^{- 1})

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 3 September 2020 Shift 1>Q 52

The complex that can show optical activity is :

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 2nd April 2017>Q 53

On treatment of

100 mL

0.1 M

solution of

{CoCl}_{3} . 6 H_{2} O

with excess

{AgNO}_{3}; 1 .2 \times 10^{22}

ions are precipitated. The complex is:

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 27 July 2021 Shift 2>Q 54

Given below are two statements :
Statement I: ${[Mn (CN)_{6}]}^{3 -}, {[Fe (CN)_{6}]}^{3 -}$ and ${[Co {(C_{2} O_{4})}_{3}]}^{3 -}$ are $d^{2} {sp}^{3}$ hybridised.
Statement II : ${[{MnCl}_{6}]}^{3 -}$ and ${[{FeF}_{6}]}^{3 -}$ are paramagnetic and have $4$ and $5$ unpaired electrons, respectively.

In the light of the above statements, choose the correct answer from the options given below:

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 27 July 2021 Shift 2>Q 55

3

moles of metal complex with formula

Co (en)_{2} {Cl}_{3}

gives

3

moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of

Co

in the complex is (Round off to the nearest integer)

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 27 July 2021 Shift 1>Q 56

The number of geometrical isomers found in the metal complexes

[{PtCl}_{2} {({NH}_{3})}_{2}], [Ni (CO)_{4}], [Ru {(H_{2} O)}_{3} {Cl}_{3}]

and

{[{CoCl}_{2} {({NH}_{3})}_{4}]}^{+}

respectively, are:

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 27 July 2021 Shift 1>Q 57

The number of geometrical isomers possible in triamminetrinitrocobalt

(III)

X

and in trioxalatochromate

(III)

Y .

Then the value of

X + Y

____.

The denticity of an organic ligand, biuret is :

Important Questions on Coordination Compounds

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