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

MEDIUM

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IMPORTANT

Earn 100

On complete reaction of ${FeCl}_{3}$ with oxalic acid in aqueous solution containing $KOH$ , resulted in the formation of product $A$ . The secondary valency of Fe in the product A is ______ .

(Round off to the Nearest Integer).

45% studentsanswered this correctly

Important Questions on Coordination Compounds

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main 16 March 2021 Shift 2>Q 6

Arrange the following metal complex/ compounds in the increasing order of spin only magnetic moment. Presume all the three, high spin system.

(Atomic numbers $Ce = 58, Gd = 64$ and $Eu = 63$ .)

(a) ${({NH}_{4})}_{2} [Ce {({NO}_{3})}_{6}]$

(b) $Gd {({NO}_{3})}_{3}$ and

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main 16 March 2021 Shift 1>Q 7

The equivalents of ethylene diamine required to replace the neutral ligands from the coordination sphere of the trans-complex of

{CoCl}_{3} . 4 {NH}_{3}

is _______ . (Round off to the Nearest Integer).

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 9th January 2020 Shift 2>Q 8

The isomer(s) of

[C o {(N H_{3})}_{4} C l_{2}]

that has/ have a

C l - C o - C l

angle of

90^{o},

is/are:

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 9th January 2020 Shift 1>Q 9

Complex

X

Of composition

C r {(H_{2} O)}_{6} C l_{n}

Has a spin only magnetic moment of

3.83 B . M .

It reacts with

{A g N O}_{3}

And shows geometrical isomerism. The IUPAC nomenclature of

X

Is:

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 9th January 2019 Shift 2>Q 10

Homoleptic octahedral complexes of a metal ion

' M^{3 +}'

with three monodentate ligands

L_{1}, L_{2} a n d L_{3}

absorb wavelengths in the region of green, blue and red respectively. The increasing order of the ligand strength is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 9th January 2019 Shift 2>Q 11

The complex that has highest crystal field splitting energy

(∆)

, is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 9th January 2019 Shift 1>Q 12

Two complexes

[Cr {(H_{2} O)}_{6}] {Cl}_{3} (A)

and

[Cr {({NH}_{3})}_{6}] {Cl}_{3} (B)

are violet and yellow coloured, respectively, The incorrect statement regarding them is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 20 - Coordination Compounds>JEE Main - 9th April 2019 Shift 2>Q 13

The maximum possible denticities of a ligand given below towards a common transition and inner-transition metal ion, respectively, are:

On complete reaction of FeCl3 with oxalic acid in aqueous solution containing KOH, resulted in the formation of product A. The secondary valency of Fe in the product A is ______ . (Round off to the Nearest Integer).

Important Questions on Coordination Compounds

Learn and Prepare for any exam you want !

On complete reaction of ${FeCl}_{3}$ with oxalic acid in aqueous solution containing $KOH$ , resulted in the formation of product $A$ . The secondary valency of Fe in the product A is ______ .

(Round off to the Nearest Integer).