Coordination Compounds Test

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Coordination Compounds Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

According to Werner's theory of complexes, primary valencies are

A
equal to secondary valencies

B
oxidation states of the metal

C
coordination numbers of the metal

D
All of the above

Solution

According to Werner's theory of complexes, primary valencies are oxidation states of the metal. The secondary valency refers to the coordination number of the central metal atom.
Question 2
1 / -0

The number of chloride ions produced by complex tetraminedichloroplatinum(IV) chloride in an aqueous solution is

A
four

B
two

C
one

D
three

Solution

The formula of tetraminedichloroplatinum(IV) chloride:
[Pt(NH₃)₄CI₂]CI₂
In aqueous solution, the above compound is ionised as:
[Pt(NH₃)₄CI₂]CI₂ [Pt(NH₃)₄CI₂]²⁺ + 2CI^-
So, the number of chloride ions is 2.
Question 3
1 / -0

Primary and secondary valencies of [Cr(NH₃)₅Cl]SO₄ respectively are

A
3 and 6

B
5 and 1

C
5 and 6

D
3 and 3

Solution

In the given coordination compound, primary valency (oxidation state) is 3 and secondary valency (coordination number) is six.
Question 4
1 / -0

Oxidation state of the central metal ion in [Pt(NH₃)₂(NO₃)₂]SO₄ is

A
+ 1

B
+ 2

C
+ 3

D
+ 4

Solution

Oxidation state of the central metal ion in [Pt(NH₃)₂(NO₃)₂]SO₄:
⇒x - 2 = 2
⇒x = 4
Question 5
1 / -0

Which of the following statements is correct?

A
[Cr(NH₃)₆]³⁺ is diamagnetic.

B
Oxidation state of Ni in [Ni(CO)₄] is zero.

C
Ligands are generally electron acceptors.

D
Chelating complexes are formed by monodentate ligands.

Solution

Nickel tetracarbonyl contains nickel in zero oxidation state.

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Coordination Compounds Test - 5

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Coordination Compounds Test - 5

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Question 1

equal to secondary valencies

oxidation states of the metal

coordination numbers of the metal

All of the above

Solution

Question 2

four

two

one

three

Solution

Question 3

3 and 6

5 and 1

5 and 6

3 and 3

Solution

Question 4

+ 1

+ 2

+ 3

+ 4

Solution

Question 5

[Cr(NH3)6]3+ is diamagnetic.

Oxidation state of Ni in [Ni(CO)4] is zero.

Ligands are generally electron acceptors.

Chelating complexes are formed by monodentate ligands.

Solution

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[Cr(NH₃)₆]³⁺ is diamagnetic.

Oxidation state of Ni in [Ni(CO)₄] is zero.