Coordination Compounds Test

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Coordination Compounds Test - 14

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Weekly Quiz Competition

Question 1
1 / -0

Choose a complex whose IUPAC name is not correctly written.

A
[CoCl(ONO)(en)₂]⁺: Chloridobis(ethylenediamine)nitrito-O-cobaltate(III)ion

B
Cr(C₆H₆)₂: Bis(Benzene)chromium(0)

C
Na[PtClBr(NO₂)(NH₃)] : Sodium amminebromidochloridonitro-N-platinate(II)

D
Ba[BrF₄]₂:Barium tetrafluoridobromate(III)

Solution

The correct IUPAC name of the complex ion given in option (1) is Chloridobis(ethylenediamine)nitrito-O-cobalt(III)ion.
Question 2
1 / -0

Which of the following options is incorrect in the context of ligands?

A
The ligands in a metal ligand complex act as Lewis bases.

B
The larger the ligand, the more stable is the metal ligand complex.

C
The larger the permanent dipole moment of ligand, the more stable is the bond.

D
The crystal field splitting (Δ_o) depends upon the field produced by the ligand and the charge on the metal ion.

Solution

Statement (2) is incorrect as the larger the ligand attached to the complex, the less stable will be the metal ligand complex.
Question 3
1 / -0

Directions For Questions

The following question has four choices, out of which ONLY ONE is correct.

...view full instructions

A complex compound 'A' of cobalt contains both NH₃ and Cl^- ions as ligands. 'A' gives white precipitates with AgNO₃ and gives two moles of silver chloride per mole of it.

The formula of 'A' may be

A
[Co(NH₃)₅Cl]Cl₂

B
[Co(NH₃)₄Cl₂]Cl

C
[Co(NH₃)₃Cl₃]

D
[Co(NH₃)₆]Cl₃

Solution

Since, the complex salt produces two moles of AgCl per mole of it, so it must contain two Cl^- ions outside the co-ordination sphere as counter ions.
Question 4
1 / -0

The coordination numbers of cobalt in the complexes [Co(NH₃)₄Cl₂]Cl and [Co(en)₂Cl₂]Br, respectively, are

A
2 and 8

B
4 and 7

C
6 and 6

D
7 and 4

Solution

The complex [Co(NH₃)₄Cl₂]Cl has a total of 6 monodentate ligands: Four NH₃ and two Cl^-.
The complex [Co(en)₂Cl₂]Br has two monodentate ligands (Cl^-) ions and two bidentate ligands (en).

Hence, co-ordination number of cobalt is 6 in both the compounds.
Question 5
1 / -0

An oxo complex of Mo is [Mo₂O₄(H₂O)₂(C₂H₄)₂]^2-. What is the oxidation state of the central metal atom in it?

A
+5

B
+4

C
+3

D
+2

Solution

Let the oxidation state of Mo be x.
2x + 4(-2) + (2 x 0) + (2 x 0) = - 2
x = +3
Question 6
1 / -0

Directions For Questions

The following question has four choices, out of which ONLY ONE is correct.

...view full instructions

What is the IUPAC name of [Co(NH₃)₃Cl₃]?

A
Pentaamminechlorocobalt(III)chloride

B
Hexaamminecobalt(III)chloride

C
Triamminetrichlorocobalt(III)

D
Tetraamminedichlorocobalt(III)chloride

Solution

(3) is correct as it represents [Co(NH₃)₃Cl₃].

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Coordination Compounds Test - 14

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Coordination Compounds Test - 14

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Question 1

[CoCl(ONO)(en)2]+: Chloridobis(ethylenediamine)nitrito-O-cobaltate(III)ion

Cr(C6H6)2: Bis(Benzene)chromium(0)

Na[PtClBr(NO2)(NH3)] : Sodium amminebromidochloridonitro-N-platinate(II)

Ba[BrF4]2: Barium tetrafluoridobromate(III)

Solution

Question 2

The ligands in a metal ligand complex act as Lewis bases.

The larger the ligand, the more stable is the metal ligand complex.

The larger the permanent dipole moment of ligand, the more stable is the bond.

The crystal field splitting (Δo) depends upon the field produced by the ligand and the charge on the metal ion.

Solution

Question 3

[Co(NH3)5Cl]Cl2

[Co(NH3)4Cl2]Cl

[Co(NH3)3Cl3]

[Co(NH3)6]Cl3

Solution

Question 4

2 and 8

4 and 7

6 and 6

7 and 4

Solution

Question 5

+5

+4

+3

+2

Solution

Question 6

Pentaamminechlorocobalt(III)chloride

Hexaamminecobalt(III)chloride

Triamminetrichlorocobalt(III)

Tetraamminedichlorocobalt(III)chloride

Solution

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[CoCl(ONO)(en)₂]⁺: Chloridobis(ethylenediamine)nitrito-O-cobaltate(III)ion

Cr(C₆H₆)₂: Bis(Benzene)chromium(0)

Na[PtClBr(NO₂)(NH₃)] : Sodium amminebromidochloridonitro-N-platinate(II)

Ba[BrF₄]₂:Barium tetrafluoridobromate(III)

The crystal field splitting (Δ_o) depends upon the field produced by the ligand and the charge on the metal ion.

[Co(NH₃)₅Cl]Cl₂

[Co(NH₃)₄Cl₂]Cl

[Co(NH₃)₃Cl₃]

[Co(NH₃)₆]Cl₃