Coordination Compounds Test

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Coordination Compounds Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which among the following is an ambidentate ligand?

A
Acetate

B
Carbonyl

C
Oxalate

D
Nitro

Solution

Explanation:
ONO⁻ and NO₂⁻
Question 2
1 / -0

A group of atoms can function as a ligand only when

A
It is capable of acting as donor of electron pair

B
It is a negatively charged ion

C
It is a small molecule

D
It is a positively charged ion

Solution

Explanation:

Ligands are electron donors.
Question 3
1 / -0

The coordination number of Cr in [Cr(NH₃)₃(H₂O)₃] Cl₃ is

A
2

B
4

C
6

D
3

Solution

Explanation:

Coordination number of the central ion is equal to no. of coordination bonds formed with surrounding ions.
Question 4
1 / -0

The oxidation number of Fe in K₄ [Fe(CN)₆] ] is

A
0

B
2

C
1

D
3

Solution

Explanation:

CN has charge of –1 charge.
Question 5
1 / -0

Which of the following is most likely structure of CrCl₃.6H₂O if 1/3 of total chlorine of the compound is

precipitated by adding AgNO3 to its aqueous solution?

A
[CrCl. (H₂O)₅] Cl₂.H₂O

B
[Cr(H₂O)₃Cl₃] (H₂O)₃

C
[C_rCl₂(H₂O)₄]Cl.2H₂O

D
CrCl₃.6H₂O

Solution

Explanation:

1 mol of Cl is precipitated so 1 Cl will be present outside the coordination sphere.
Question 6
1 / -0

The coordination number of the central ion may be obtained from

A
The number of ions of opposite charge immediately surrounding the specific ion

B
The number of ionic bonds formed with the surrounding ions

C
The number of coordinate bonds formed with the surrounding ions

D
None of these

Solution

Explanation:

Coordination number of the central ion is equal to no. of coordination bonds formed with surrounding ions.
Question 7
1 / -0

Which of the following complex will give white precipitate with barium chloride solution?

A
Both (a) and (b)

B
[Cr (NH₃)₅Cl] SO₄

C
[C_r(NH₃)₅SO₄] Cl

D
[Co (NH₃)₄Cl₂] NO₂

Solution

Explanation:

BaSO4 is precipitated when SO₄²⁻ ion is present outside the coordination sphere.
Question 8
1 / -0

The IUPAC name [CoCl (NO₂) (en)₂] Cl is

A
Bis(ethylenediamine)chloronitrocobalt(III)chloride

B
Chloridobis(ethylenediamine)nitrito – N – cobalt(III) chloride

C
Chloridonitrobis(ethylenediamine)cobalt(III)chloride

D
Chloridonitrobis(ethylenediamine)cobalt(II)chloride

Solution

Explanation:

Name of ligands name first in alphabetical order followed by anme of central ion.

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Coordination Compounds Test - 1

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Question 1

Acetate

Carbonyl

Oxalate

Nitro

Solution

Question 2

It is capable of acting as donor of electron pair

It is a negatively charged ion

It is a small molecule

It is a positively charged ion

Solution

Question 3

2

4

6

3

Solution

Question 4

0

2

1

3

Solution

Question 5

[CrCl. (H2O)5] Cl2.H2O

[Cr(H2O)3Cl3] (H2O)3

[CrCl2(H2O)4]Cl.2H2O

CrCl3.6H2O

Solution

Question 6

The number of ions of opposite charge immediately surrounding the specific ion

The number of ionic bonds formed with the surrounding ions

The number of coordinate bonds formed with the surrounding ions

None of these

Solution

Question 7

Both (a) and (b)

[Cr (NH3)5 Cl] SO4

[Cr (NH3)5 SO4] Cl

[Co (NH3)4 Cl2] NO2

Solution

Question 8

Bis(ethylenediamine)chloronitrocobalt(III)chloride

Chloridobis(ethylenediamine)nitrito – N – cobalt(III) chloride

Chloridonitrobis(ethylenediamine)cobalt(III)chloride

Chloridonitrobis(ethylenediamine)cobalt(II)chloride

Solution

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[CrCl. (H₂O)₅] Cl₂.H₂O

[Cr(H₂O)₃Cl₃] (H₂O)₃

[C_rCl₂(H₂O)₄]Cl.2H₂O

CrCl₃.6H₂O

[Cr (NH₃)₅Cl] SO₄

[C_r(NH₃)₅SO₄] Cl

[Co (NH₃)₄Cl₂] NO₂