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 - 2 September 2020 Shift 1>Q 80

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JEE Main

IMPORTANT

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For octahedral $Mn (II)$ and tetrahedral $Ni (II)$ complexes, consider the following statements :

$(I)$ both the complexes can be high spin.

$(II)$ $Ni (II)$ complex can very rarely be of low spin.

$(III)$ with strong field ligands, $Mn (II)$ complexes can be low spin.

$(IV)$ aqueous solution of $Mn (II) ions$ is yellow in color.

The correct statements are :

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Important Questions on Coordination Compounds

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 2 September 2020 Shift 1>Q 81

The oxidation states of iron atoms in compounds

(A)

,

(B)

and

(C)

, respectively, are

x, y

and

z

. Then sum of

x, y

and

z

is ...........

\underset{(A)}{{Na}_{4} [Fe {(CN)}_{5} (NOS)]} \underset{(B)}{{Na}_{4} [{FeO}_{4}]} \underset{(C)}{[{Fe}_{2} {(CO)}_{9}]}

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 19th April 2014>Q 82

An octahedral complex with molecular composition M.5NH₃.Cl.SO₄ has two isomers, A and B. The solution of A gives a white precipitate with AgNO₃ solution and the solution of B gives white precipitate with BaCl₂ solution .The type of isomerism exhibited by the complex is :

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 19th April 2014>Q 83

Amongst the following, identify the species with an atom in