Transition Metals and Coordination Chemistry Quizzes for Sixth Form College Chemistry

Question 1

Which type of bond is formed between the metal ion and the ligands in a coordination complex?

Accepted Answer

Coordinate bond

Answer

Ionic bond

Answer

Covalent bond

Answer

Metallic bond

Question 2

Predict the geometry of the complex ion [Ni(NH3)4]2+ based on valence bond theory.

Accepted Answer

Square planar

Answer

Tetrahedral

Answer

Octahedral

Answer

Trigonal bipyramidal

Question 3

Isomerism is a common phenomenon in coordination complexes. Which of the following is an example of linkage isomerism?

Accepted Answer

[Co(NH3)5NO2]Cl2

Answer

[Co(NH3)5Cl]Cl2

Answer

[Co(en)2Cl2]^+

Answer

[Co(NH3)4Cl2]NO2

Question 4

IUPAC nomenclature is used to systematically name coordination complexes. What is the IUPAC name for [Co(NH3)5Cl]^2+?

Accepted Answer

Pentaamminechlorocobalt(II) ion

Answer

Chloropentaamminecobalt(II) ion

Answer

Cobalt(II) pentaamminechloride

Answer

Cobalt(II) chloropentaammine

Question 5

The hybridization of the metal ion in a coordination complex can influence its geometry. What is the hybridization of the metal ion in [Ni(CN)4]^2-?

Accepted Answer

dsp2

Answer

sp

Answer

sp2

Answer

sp3

Question 6

What is the coordination number of the metal ion in the complex ion [Fe(CN)6]4-?

Accepted Answer

6

Answer

4

Answer

8

Answer

10

Question 7

Which of the following ligands is a strong-field ligand?

Accepted Answer

CN-

Answer

H2O

Answer

NH3

Answer

Cl-

Question 8

What is the coordination sphere of the metal ion in the complex ion [Cr(H2O)6]3+?

Accepted Answer

An octahedron

Answer

A tetrahedron

Answer

A square plane

Answer

A trigonal pyramid

Question 9

What is the coordination number of the metal ion in the complex [Fe(CN)6]4-?

Accepted Answer

6

Answer

4

Answer

8

Answer

10

Question 10

Which of the following ligands acts as a chelating agent?

Accepted Answer

en

Answer

H2O

Answer

NH3

Answer

Cl-

Question 11

The coordination complex [Fe(CN)6]4- exhibits which type of geometry?

Accepted Answer

Octahedral

Answer

Square planar

Answer

Tetrahedral

Answer

Trigonal bipyramidal

Question 12

Which of the following is NOT a common reaction type in coordination chemistry?

Accepted Answer

Addition reactions

Answer

Ligand exchange

Answer

Substitution reactions

Answer

Redox reactions

Question 13

According to IUPAC nomenclature, what is the correct name for the complex [PtCl2(NH3)4]?

Accepted Answer

Tetraamminedichloro-platinum(II)

Answer

Diamminetetrachloroplatinum(IV)

Answer

Tetrachlorotetraammineplatinum(II)

Answer

Tetraammineplatinum(II) dichloride

Question 14

Which characteristic is NOT associated with transition metals?

Accepted Answer

High ionization energies

Answer

Variable oxidation states

Answer

Formation of colored ions

Answer

High melting points

Question 15

What is the coordination number of the metal ion in the complex [Co(NH3)6]3+?

Accepted Answer

6

Answer

4

Answer

8

Answer

12

Question 16

Which of the following is a strong-field ligand?

Accepted Answer

CN-

Answer

Cl-

Answer

H2O

Answer

NH3

Question 17

Which of the following complexes is square planar?

Accepted Answer

[PtCl4]2-

Answer

[Ni(NH3)4]Cl2

Answer

[Co(NH3)6]Cl3

Answer

[Mn(CN)6]4-

Question 18

What is the oxidation state of the metal ion in the complex [Cr(CN)6]3-?

Accepted Answer

+3

Answer

+2

Answer

+6

Answer

-3

Question 19

What is the correct IUPAC name for the complex [Pt(en)2Cl2]?

Accepted Answer

Dichlorodiethylenediamineplatinum(II)

Answer

Tetrachloroplatinate(II)

Answer

Dichlorobis(ethylenediamine)platinum(IV)

Answer

Tetraammineplatinum(II) chloride

Question 20

Which of the following is a defining characteristic of transition metals?

Accepted Answer

Paramagnetic nature

Answer

High electrical conductivity

Answer

Low melting points

Answer

Diamagnetic nature

Question 21

In a coordination complex, the coordination sphere refers to:

Accepted Answer

The central metal ion and its ligands

Answer

The ligands surrounding the central metal ion only

Answer

The ligands and the counterions present

Answer

The central metal ion only

Question 22

For a metal ion in a complex with three ligands, what is its coordination number?

Accepted Answer

3

Answer

2

Answer

4

Answer

6

Question 23

Which type of isomerism results from the different spatial arrangements of ligands around the metal ion?

Accepted Answer

Stereoisomerism

Answer

Structural isomerism

Answer

Ionization isomerism

Answer

Solvate isomerism

Question 24

What is the hybridization of the central metal ion in the complex [Fe(CN)6]3-?

Accepted Answer

sp3d2

Answer

sp

Answer

sp2

Answer

sp3

Question 25

What is the primary application of EDTA in analytical chemistry?

Accepted Answer

As a complexing agent for metal ions

Answer

As an indicator in acid-base titrations

Answer

As a catalyst in redox reactions

Answer

As a buffer in aqueous solutions

Question 26

Provide the IUPAC name for the complex [Cr(en)2Cl2]Br?

Accepted Answer

Dichloro-bis(ethylenediamine)chromium(III) bromide

Answer

Dibromobis(ethylenediamine)chromium(III) chloride

Answer

Dichloro-bis(ethylamine)chromium(III) bromide

Answer

Dibromobis(ethylenediamine)chromium(II) chloride

Question 27

What type of bond is formed between a metal ion and a monodentate ligand?

Accepted Answer

Coordinate covalent bond

Answer

Covalent bond

Answer

Ionic bond

Answer

Hydrogen bond

Question 28

Which of the following is an example of a bidentate ligand?

Accepted Answer

EDTA

Answer

NH3

Answer

Cl-

Answer

H2O

Question 29

What does the coordination sphere of a metal ion include?

Accepted Answer

The metal ion and its ligands

Answer

The metal ion itself

Answer

The ligands only

Answer

The metal ion and the solvent molecules surrounding it

Question 30

What is the coordination sphere of a metal complex?

Accepted Answer

The metal ion and the ligands bonded to it

Answer

The ligands bonded to the metal ion

Answer

The metal ion and the ions in solution

Answer

The entire complex, including the metal ion, ligands, and any ions in solution

Question 31

What is the hybridization of the metal ion in [Co(NH3)6]3+?

Accepted Answer

d2sp3

Answer

sp3d2

Answer

dsp3

Answer

sp3

Question 32

Which of the following ligands is a strong-field ligand?

Accepted Answer

CN-

Answer

Cl-

Answer

H2O

Answer

NH3

Question 33

Which of the following is a square planar complex?

Accepted Answer

[Ni(CN)4]2-

Answer

[Co(NH3)6]3+

Answer

[Fe(H2O)6]2+

Answer

[Cr(en)3]3+

Question 34

What is the color of a [Ti(H2O)6]3+ solution?

Accepted Answer

Pale yellow

Answer

Colorless

Answer

Blue

Answer

Violet

Question 35

Which of the following is a redox reaction involving a transition metal complex?

Accepted Answer

[Fe(CN)6]4- + [MnO4]- → [Fe(CN)6]3- + [MnO4]2-

Answer

[Cu(NH3)4]2+ + [Ag+] → [Cu(NH3)4]+ + [Ag0]

Answer

[Co(NH3)6]3+ + [Cl-] → [Co(NH3)5Cl]2+ + [NH3]

Answer

[Ni(CO)4] + [H2] → [Ni(CO)3H] + [CO]

Question 36

What is the stability constant of a coordination complex?

Accepted Answer

The equilibrium constant for the formation of the complex

Answer

The rate constant for the formation of the complex

Answer

The concentration of the complex at equilibrium

Answer

The change in free energy for the formation of the complex

Question 37

Which type of bonding is responsible for the formation of coordination complexes?

Accepted Answer

Coordinate covalent bonding

Answer

Covalent bonding

Answer

Ionic bonding

Answer

Hydrogen bonding

Question 38

What is the coordination sphere of a complex ion?

Accepted Answer

The central metal ion and its ligands

Answer

The electrons surrounding the central metal ion

Answer

The valence electrons of the ligands

Answer

The ligands surrounding the molecules

Question 39

Which of the following is a characteristic property of transition metals?

Accepted Answer

Variable oxidation states

Answer

High melting point

Answer

Form colorless ions

Answer

Good conductors of heat

Question 40

Stereoisomerism arises due to:

Accepted Answer

Different spatial arrangements of ligands around the central metal ion

Answer

Different charges of the coordination complex

Answer

Different oxidation states of the central metal ion

Answer

Different types of ligands bonded to the central metal ion

Question 41

Which of the following complexes exhibits geometrical isomerism?

Accepted Answer

[Co(NH3)4Cl2]+

Answer

[Fe(CN)6]4-

Answer

[Cr(H2O)6]3+

Answer

[Ni(CO)4]

Question 42

Which of the following reactions is an example of a redox reaction?

Accepted Answer

[Fe(H2O)6]3+ + Cr2O72- → [Fe(H2O)6]2+ + Cr3+ + H+

Answer

[Fe(H2O)6]3+ + 3OH- → [Fe(OH)3] + 3H2O

Answer

[Fe(H2O)6]3+ + 6NH3 → [Fe(NH3)6]3+ + 6H2O

Answer

[Fe(NH3)6]3+ + 2Cl- → [Fe(NH3)4Cl2]+ + 2NH3

Question 43

Which of the following is a characteristic property of transition metals?

Accepted Answer

Variable oxidation states

Answer

High reactivity with water

Answer

Poor electrical conductivity

Answer

Low melting points

Question 44

What is the coordination number of the iron ion in the complex [Fe(NH3)6]3+?

Accepted Answer

6

Answer

12

Answer

8

Answer

4

Question 45

Which of the following ligands is a chelating ligand?

Accepted Answer

EDTA

Answer

Water (H2O)

Answer

Chloride ion (Cl-)

Answer

Ammonia (NH3)

Question 46

What is the shape of the complex [Ni(CN)4]2-?

Accepted Answer

Square planar

Answer

Octahedral

Answer

Tetrahedral

Answer

Trigonal bipyramidal

Question 47

Which of the following is an example of linkage isomerism?

Accepted Answer

[Co(NH3)5NO2]Cl2 and [Co(NH3)5Cl]NO2

Answer

[Cr(H2O)6]Cl3 and [Cr(H2O)5Cl]Cl2·H2O

Answer

[Fe(CN)6]4- and [Fe(SCN)6]4-

Answer

[Co(NH3)6]Cl3 and [Co(NH3)5Cl]Cl2

Question 48

What is the IUPAC name for the complex K4[Fe(CN)6]?

Accepted Answer

Potassium hexacyanoferrate(II)

Answer

Iron(III) hexacyanide

Answer

Iron(II) hexacyanide

Answer

Potassium hexacyanoferrate(III)

Question 49

Which of the following is a redox reaction involving a transition metal?

Accepted Answer

2Fe3+ + 2I- → 2Fe2+ + I2

Answer

CH4 + 2O2 → CO2 + 2H2O

Answer

NaOH + HCl → NaCl + H2O

Answer

AgNO3 + NaCl → AgCl + NaNO3

Question 50

What is the color of an aqueous solution containing [Cu(H2O)6]2+ ions?

Accepted Answer

Blue

Answer

Green

Answer

Red

Answer

Yellow

Question 51

Which of the following best describes a d-d transition?

Accepted Answer

The absorption of light by a transition metal ion causing an electron to move between d orbitals.

Answer

The release of energy by a transition metal ion when an electron drops to a lower energy level.

Answer

The absorption of light by a transition metal ion leading to the loss of an electron.

Answer

The emission of light by a transition metal ion when an electron moves to a higher energy level.