Coordination Compounds Practice Questions
Class 12 · Chemistry · 2567 free MCQs with instant results and detailed explanations.
2567
Total
850
Easy
1233
Medium
484
Hard
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Topics in Coordination Compounds
Crystal Field Theory
612
Werner's Theory
771
Isomerism
549
IUPAC Nomenclature
635
Sample Questions from Coordination Compounds
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
According to Werner's Theory of Coordination Compounds, which of the following statements is true regarding the primary and secondary valences?
A.
Primary valence is satisfied by neutral ligands only.
B.
Secondary valence is the total number of ligands attached to the metal.
C.
Primary valence indicates the oxidation state of the central metal ion.
D.
Secondary valence determines the molecular geometry of the coordination compound.
Show Answer & Explanation
Correct Answer: C
Werner's Theory states that primary valence relates to the oxidation state of the metal ion, while secondary valence refers to the coordination number formed by ligands.
Q2
Easy
In a coordination compound represented by [Cu(NH3)4]SO4, what is the coordination number of the copper ion (Cu)?
A.
2
B.
4
C.
6
D.
8
Show Answer & Explanation
Correct Answer: B
The coordination number is determined by the number of ligands attached to the central metal ion. In this case, there are four ammonia ligands binding to copper, thus the coordination number is 4.
Q3
Easy
Which of the following ligands is considered a bidentate ligand according to Werner's Theory?
A.
NH3
B.
EDTA
C.
Cl-
D.
H2O
Show Answer & Explanation
Correct Answer: B
A bidentate ligand is capable of forming two bonds with a central metal ion. EDTA can attach through multiple sites, making it a classic example of a bidentate ligand.
Q4
Medium
According to Werner's theory, what is the coordination number of a central metal ion in a complex?
A.
Number of ligands attached
B.
Number of electrons donated
C.
Total oxidation state
D.
Type of hybridization
Show Answer & Explanation
Correct Answer: A
The coordination number refers to the number of ligands that are directly bonded to the central metal ion.
Q5
Medium
What is the main postulate of Werner's theory regarding the nature of metal complexes?
A.
Only monodentate ligands are possible
B.
Complexes can have both primary and secondary valencies
C.
All metals form octahedral complexes
D.
Complexes are only formed in solution
Show Answer & Explanation
Correct Answer: B
Werner's theory states that complexes consist of primary valency, which is ionic, and secondary valency, which is covalent.
Q6
Medium
In Werner's theory, the term 'primary valency' refers to the:
A.
Number of coordinate bonds
B.
Oxidation state of the metal
C.
Nature of the ligand
D.
Type of hybridization
Show Answer & Explanation
Correct Answer: B
Primary valency is related to the oxidation state of the metal ion in the complex.
Q7
Medium
Which of the following statements is NOT true according to Werner's theory?
A.
Metal ions can have different coordination numbers
B.
Ligands can be neutral or charged
C.
All complexes are octahedral
D.
Complexes have defined geometries
Show Answer & Explanation
Correct Answer: C
Werner's theory does not claim that all complexes are octahedral; they can also be tetrahedral or square planar.
Q8
Hard
Which of the following statements correctly describes Werner's theory of coordination compounds?
A.
Coordination compounds consist of central metal atoms surrounded by anions.
B.
Coordination compounds have fixed oxidation states and variable coordination numbers.
C.
Coordination compounds are formed by the combination of metal ions and ligands in specific ratios.
D.
Coordination compounds can only form with transition metals.
Show Answer & Explanation
Correct Answer: C
Werner's theory states that coordination compounds are formed when metal ions combine with ligands in specific proportions, leading to a defined stoichiometry.
Q9
Hard
According to Werner's theory, which type of isomerism is primarily associated with coordination compounds?
A.
Geometrical isomerism
B.
Optical isomerism
C.
Structural isomerism
D.
All of the above
Show Answer & Explanation
Correct Answer: D
Werner's theory allows for various isomerisms including geometrical, optical, and structural, depending on ligand arrangement and metal coordination.
Q10
Hard
In Werner's theory, what does the term 'primary valency' refer to?
A.
The total number of coordination sites available on the metal.
B.
The oxidation state of the central metal ion.
C.
The arrangement of ligands around the metal ion.
D.
The bonding strength between metal and ligands.
Show Answer & Explanation
Correct Answer: B
Primary valency refers to the oxidation state of the metal ion in a coordination compound, determining its charge.
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Coordination Compounds — Class 12 Chemistry Practice Questions Online
This page contains 2567 practice MCQs for the chapter Coordination Compounds in Class 12 Chemistry. The questions are organized by difficulty — 850 easy, 1233 medium, 484 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.