Transition Metals: Interactive Quizzes and Learning Resources

Question 1

Which factors influence the geometry of octahedral and tetrahedral transition metal complexes? Explain your answer using crystal field theory and the electronic configurations of the ligands.

Accepted Answer

The geometry of octahedral and tetrahedral transition metal complexes is determined by a combination of crystal field theory and ligand electronic configurations.

Answer

The geometry is determined solely by the number of d electrons in the metal ion.

Answer

Ligand electronic configurations have no influence on the geometry of transition metal complexes.

Answer

Crystal field theory predicts that octahedral complexes are always high-spin, while tetrahedral complexes are always low-spin.

Question 2

How does the electronic structure of transition metals contribute to their unique chemical properties, distinguishing them from main group elements?

Accepted Answer

The variable oxidation states of transition metals enable them to form diverse coordination complexes.

Answer

Transition metals have higher ionization energies than main group elements, resulting in lower reactivity.

Answer

Transition metals have a lower number of d electrons than main group elements, contributing to their lower reactivity.

Question 3

Explain the differences between homogeneous and heterogeneous catalysis involving transition metals.

Accepted Answer

In homogeneous catalysis, the catalyst is in the same phase as the reactants, while in heterogeneous catalysis, the catalyst is in a different phase.

Answer

Homogeneous catalysis is always more efficient than heterogeneous catalysis.

Answer

Heterogeneous catalysis is only used when the reactants are gases.

Answer

Homogeneous catalysis is only used when the reactants are in solution.

Question 4

Which of the following statements accurately describes a characteristic property of transition metals?

Accepted Answer

High melting points

Answer

Inertness

Answer

Low oxidation states

Answer

Brittle nature

Question 5

The ligand exchange reaction between a complex ion and a ligand is primarily classified as a:

Accepted Answer

Substitution reaction

Answer

Redox reaction

Answer

Dissociation reaction

Answer

Addition reaction

Question 6

Among the given options, which ligand is classified as a strong field ligand?

Accepted Answer

CN-

Answer

H2O

Answer

NH3

Answer

Cl-

Question 7

The Haber process, an essential industrial reaction, utilizes a transition metal catalyst to accomplish which transformation?

Accepted Answer

Produce ammonia from hydrogen and nitrogen

Answer

Convert methane to methanol

Answer

Oxidize carbon monoxide to carbon dioxide

Answer

Reduce nitrogen oxides to ammonia

Question 8

Identify the reaction that exemplifies a redox reaction involving a transition metal.

Accepted Answer

2CuSO4 + 4KI → 2CuI + 2K2SO4 + I2

Answer

Fe + 2HCl → FeCl2 + H2

Answer

AgNO3 + NaCl → AgCl + NaNO3

Answer

CaCO3 → CaO + CO2

Question 9

Which property is NOT characteristic of transition metals?

Accepted Answer

Low melting points

Answer

Variable oxidation states

Answer

Formation of colored ions

Answer

Strong reducing agents

Question 10

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

Accepted Answer

Cu²⁺ + 2e⁻ → Cu

Answer

Fe²⁺ + 2Cl⁻ → FeCl2

Answer

Ag⁺ + Cl⁻ → AgCl

Answer

Zn²⁺ + 2NaOH → Zn(OH)2

Question 11

Which of the following is NOT a characteristic property of transition metals?

Accepted Answer

Inertness towards corrosion

Answer

Variable oxidation states

Answer

Formation of colored ions

Answer

High melting and boiling points

Question 12

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

Accepted Answer

CN⁻

Answer

Cl⁻

Answer

H₂O

Answer

NH₃

Question 13

The catalytic activity of transition metals is primarily attributed to their:

Accepted Answer

Presence of unpaired d-electrons

Answer

Variable oxidation states

Answer

Ability to form stable coordination complexes

Answer

High thermal conductivity

Question 14

The chemotherapeutic drug cisplatin is a coordination complex with the formula:

Accepted Answer

[Pt(NH₃)₂Cl₂]

Answer

[Pt(en)₂Cl₂]

Answer

[Pt(CN)₄]²⁻

Answer

[Pt(H₂O)₆]²⁺

Question 15

The reaction of potassium permanganate with oxalic acid in acidic solution results in the formation of:

Accepted Answer

Manganese(IV) ions and carbon dioxide

Answer

Manganese(II) ions and carbon dioxide

Answer

Manganese(III) ions and carbon monoxide

Answer

Manganese(VII) ions and carbon monoxide

Question 16

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

Accepted Answer

Variable oxidation states

Answer

High electrical conductivity

Answer

Formation of ionic compounds

Answer

Inertness to chemical reactions

Question 17

What geometry is adopted by a complex with the coordination sphere [Ni(NH3)6]^2+?

Accepted Answer

Octahedral

Answer

Tetrahedral

Answer

Square planar

Answer

Trigonal bipyramidal

Question 18

Which of the following ligands can act as a strong-field ligand?

Accepted Answer

CN-

Answer

Cl-

Answer

H2O

Answer

NH3

Question 19

Which transition metal is commonly used in anti-cancer drugs?

Accepted Answer

Platinum

Answer

Iron

Answer

Nickel

Answer

Zinc

Question 20

Which transition metal ion is the strongest oxidizing agent?

Accepted Answer

Mn4+

Answer

Fe2+

Answer

Fe3+

Answer

Mn2+

Question 21

What is the oxidation state of vanadium in the complex ion [V(NH3)6]³⁺?

Accepted Answer

+3

Answer

+2

Answer

+4

Answer

+5

Question 22

Which of the following ligands is a bidentate chelating agent?

Accepted Answer

en

Answer

Cl⁻

Answer

NH3

Answer

CN⁻

Question 23

What is the first step in the catalytic cycle of Wilkinson's catalyst (RhCl(PPh3)3) in homogeneous hydrogenation?

Accepted Answer

Oxidative addition of H2 to Rh(I) to form Rh(III)

Answer

Reductive elimination of Rh(I) and H2 from Rh(III)

Answer

Ligand exchange between Rh(I) and H2

Answer

Insertion of H2 into the Rh-P bond

Question 24

Which of the following applications of transition metals utilizes their magnetic properties?

Accepted Answer

Magnetic resonance imaging (MRI)

Answer

Catalysts in industrial processes

Answer

Pigments in paints and dyes

Answer

Surgical tools

Question 25

Regarding the electronic structure of transition metals, which statement is accurate?

Accepted Answer

They possess one or more d electrons.

Answer

Their d orbitals are completely filled.

Answer

They lack d electrons.

Answer

The number of d electrons varies.

Question 26

In the complex ion [Fe(CN)6]4-, determine the coordination number of the Fe ion.

Accepted Answer

6

Answer

2

Answer

4

Answer

8

Question 27

Identify a typical reaction associated with transition metals.

Accepted Answer

Redox reactions

Answer

Acid-base reactions

Answer

Precipitation reactions

Answer

Combustion reactions

Question 28

In catalysis, how do transition metals contribute?

Accepted Answer

Lowering reaction activation energy

Answer

Providing a surface for reaction

Answer

Increasing reactant concentration

Answer

Removing impurities from the reaction

Question 29

The coordination number of a metal ion refers to the:

Accepted Answer

Number of ligands directly bonded to the metal ion

Answer

Number of electrons in the outermost shell

Answer

Number of protons in the nucleus

Answer

Number of valence electrons

Question 30

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

Accepted Answer

CO

Answer

NH3

Answer

H2O

Answer

Cl-

Question 31

Which of the following is NOT an application of transition metals in the medical field?

Accepted Answer

Semiconductor manufacturing

Answer

Cancer treatment

Answer

Imaging techniques

Answer

Antibacterial agents

Question 32

Which of the following is a d-block element?

Accepted Answer

Chromium

Answer

Sodium

Answer

Fluorine

Answer

Argon

Question 33

Which of the following electron configurations matches a transition metal **ion**?

Accepted Answer

[Ar] 3d⁵ 4s²

Answer

[Ar] 3d¹⁰ 4s²

Answer

[Ar] 4s² 4p⁶

Answer

[Ar] 3d¹⁰ 4s¹

Question 34

In [Co(NH₃)₆]³⁺, how many ligands are directly bonded to the metal ion?

Accepted Answer

6

Answer

4

Answer

5

Answer

8

Question 35

Which element among the following belongs to the d-block of the periodic table?

Accepted Answer

Chromium

Answer

Sodium

Answer

Magnesium

Answer

Chlorine

Question 36

According to IUPAC nomenclature, what is the name of the complex [Fe(CN)₆]⁴⁻?

Accepted Answer

Hexacyanoferrate(IV) ion

Answer

Hexacyanoferrate(III) ion

Answer

Hexacyanoiron(IV) ion

Answer

Hexacyanoiron(III) ion

Question 37

Which of the following is an example of a protein that contains a transition metal?

Accepted Answer

Haemoglobin

Answer

Insulin

Answer

Collagen

Answer

Albumin

Question 38

Determine the oxidation number of copper in [Cu(NH₃)₄]²⁺

Accepted Answer

+2

Answer

+1

Answer

+3

Answer

+4

Question 39

Explain the significance of redox reactions in transition metal chemistry. Provide specific examples to illustrate their mechanisms and applications.

Accepted Answer

Redox reactions in transition metal complexes involve electron transfer between the metal ion and ligands.

Answer

Redox reactions are only relevant to non-transition metals.

Answer

Redox reactions are not involved in the catalytic activity of transition metals.

Question 40

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

Accepted Answer

Formation of colored ions

Answer

High melting points

Answer

Low electrical conductivity

Answer

Brittle nature

Question 41

Which of the following is NOT a type of ligand?

Accepted Answer

Cationic

Answer

Monodentate

Answer

Bidentate

Answer

Chelating

Question 42

Which of the following is an example of a transition metal catalyst?

Accepted Answer

Nickel

Answer

Sodium

Answer

Gold

Answer

Carbon

Question 43

What is the electronic configuration of the vanadium(III) ion (V3+)?

Accepted Answer

[Ar]3d2

Answer

[Ar]3d3

Answer

[Ar]4s23d2

Answer

[Ar]4s24p1

Question 44

Which of the following is NOT an application of catalysis in the chemical industry?

Accepted Answer

Electrolysis of water

Answer

Production of sulfuric acid

Answer

Polymerization of plastics

Answer

Refining of petroleum

Question 45

Which of the following is NOT a characteristic property of transition metals?

Accepted Answer

Inertness

Answer

Variable oxidation states

Answer

Colored ions

Answer

High melting points

Question 46

The coordination complex [Fe(CN)6]4- has a:

Accepted Answer

Octahedral geometry

Answer

Tetrahedral geometry

Answer

Square planar geometry

Answer

Trigonal bipyramidal geometry

Question 47

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

Accepted Answer

CN-

Answer

Cl-

Answer

NH3

Answer

H2O

Question 48

The electronic configuration of the d-orbitals in a transition metal ion with an atomic number of 26 is:

Accepted Answer

d5

Answer

d1

Answer

d10

Answer

d15

Question 49

Which of the following factors does NOT affect the stability of a coordination complex?

Accepted Answer

Pressure

Answer

Charge of the metal ion

Answer

Nature of the ligand

Answer

Solvent

Question 50

The formation of a coordination complex involves which type of chemical interaction?

Accepted Answer

Lewis acid-base reaction

Answer

Redox reaction

Answer

Acid-base neutralization reaction

Answer

Precipitation reaction

Question 51

Which of the following is a strong-field ligand?

Accepted Answer

CN-

Answer

H2O

Answer

NH3

Answer

Cl-

Question 52

What type of isomerism is exhibited by [Co(NH3)4Cl2]+?

Accepted Answer

Geometric isomerism

Answer

Optical isomerism

Answer

Ionization isomerism

Answer

Coordinated isomerism

Question 53

Which of the following is NOT a vital biological role of transition metals?

Accepted Answer

pH regulation

Answer

Oxygen transport

Answer

Energy transfer

Answer

Electron transfer

Question 54

What is the coordination number of the metal ion in [Fe(CN)6]3-?

Accepted Answer

6

Answer

4

Answer

8

Answer

10

Question 55

What is the oxidation state of chromium in K2CrO4?

Accepted Answer

+6

Answer

+2

Answer

+3

Answer

+4

Question 56

Which of the following elements exhibits d-block characteristics, with partially filled d-orbitals in its ground state?

Accepted Answer

Zinc (Zn)

Answer

Sodium (Na)

Answer

Calcium (Ca)

Answer

Bromine (Br)

Question 57

Ligands play a crucial role in coordination complexes. Which of the following ligands can form both sigma (σ) and pi (π) bonds with a metal ion?

Accepted Answer

Cyanide ion (CN^-)

Answer

Ammonia (NH₃)

Answer

Water (H₂O)

Answer

Chloride ion (Cl^-)

Question 58

Magnetic properties of transition metal ions arise from the presence of unpaired electrons. Which of the following transition metal ions is most likely to be paramagnetic?

Accepted Answer

Vanadium ion (V³⁺)

Answer

Scandium ion (Sc³⁺)

Answer

Titanium ion (Ti⁴⁺)

Answer

Chromium ion (Cr⁶⁺)

Question 59

Transition metals have found applications in medicine. Which of the following is an example of a transition metal-containing drug used in medical treatments?

Accepted Answer

Cisplatin

Answer

Aspirin

Answer

Penicillin

Answer

Paracetamol

Question 60

Which of the following electronic configurations represents a transition metal ion?

Accepted Answer

[Ar] 3d5

Answer

[He] 2s²2p⁶

Answer

[Kr] 4d¹⁰5s¹

Answer

[Ne] 3s²3p³

Question 61

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

Accepted Answer

CN-

Answer

Cl-

Answer

NH3

Answer

H2O

Question 62

What is the IUPAC name of the complex ion [CoCl(NH₃)₅]²⁺?

Accepted Answer

Pentaamminechlorocobalt(II) ion

Answer

Hexaamminechlorocobalt(II) ion

Answer

Tetraamminechlorocobalt(III) ion

Answer

Triamminechlorocobalt(IV) ion

Question 63

Which of the following exemplifies the catalytic activity of transition metals?

Accepted Answer

The oxidation of carbon monoxide to carbon dioxide using a transition metal catalyst

Answer

The reaction of sodium with water

Answer

The precipitation of silver chloride

Question 64

Which of the following properties is characteristic of most transition metals?

Accepted Answer

Variable oxidation states

Answer

Low melting points

Answer

Low electrical conductivity

Answer

Brittleness