Transition Metals: Properties, Applications, and Exam Preparation

Question 1

Which of the following is NOT a type of ligand?

Accepted Answer

Radical

Answer

Anion

Answer

Neutral molecule

Answer

Electron pair donor

Question 2

What is the geometry of the complex [Co(NH3)6]^3+?

Accepted Answer

Octahedral

Answer

Tetrahedral

Answer

Square planar

Answer

Trigonal bipyramidal

Question 3

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

Accepted Answer

Generation of electricity

Answer

Production of fertilizers

Answer

Purification of air and water

Answer

Extraction of metals

Question 4

Which property is NOT characteristic of transition metals?

Accepted Answer

Low melting points

Answer

Variable oxidation states

Answer

Formation of coloured ions in aqueous solutions

Answer

High electrical conductivity

Question 5

Transition metals are known for their unique properties. Which of these is NOT a typical characteristic?

Accepted Answer

Low melting and boiling points

Answer

Variable oxidation states

Answer

Formation of colored ions

Answer

High thermal conductivity

Question 6

Which of the following is NOT a type of ligand that can bind to metal ions in coordination compounds?

Accepted Answer

Cations

Answer

Anions

Answer

Neutral molecules

Answer

Ligands with lone pairs of electrons

Question 7

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

Accepted Answer

The temperature of the solution

Answer

The charge of the metal ion

Answer

The size and nature of the ligand

Answer

The number of d electrons in the metal ion

Question 8

Transition metals are used in various medical applications. Which of the following is NOT an example of such an application?

Accepted Answer

Vitamins and minerals

Answer

Contrast agents for medical imaging

Answer

Anti-cancer drugs

Answer

Electrodes in pacemakers

Question 9

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

Accepted Answer

CN-

Answer

Cl-

Answer

NH3

Answer

H2O

Question 10

Which of the following electronic configurations represents a diamagnetic tetrahedral complex?

Accepted Answer

d0

Answer

d4

Answer

d6

Answer

d8

Question 11

Which of the following properties is characteristic of transition metals?

Accepted Answer

Ability to exhibit variable oxidation states

Answer

High electrical conductivity

Answer

Low melting point

Answer

High reactivity with water

Question 12

What is the oxidation state of iron in the complex ion [Fe(CN)6]4-?

Accepted Answer

+4

Answer

+2

Answer

+3

Answer

+6

Question 13

Which of the following is NOT a type of ligand?

Accepted Answer

Spectator ion

Answer

Monodentate

Answer

Polydentate

Answer

Chelating

Question 14

Which of the following factors does NOT affect the stability of coordination complexes?

Accepted Answer

Enthalpy of hydration

Answer

Charge of the metal ion

Answer

Size of the metal ion

Answer

Nature of the ligand

Question 15

Which property is NOT characteristic of transition metals?

Accepted Answer

High hardness at room temperature

Answer

Variable oxidation states

Answer

Ability to form complexes

Answer

High electrical conductivity

Question 16

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

Accepted Answer

CN-

Answer

Cl-

Answer

NH3

Answer

H2O

Question 17

What is the name of the reaction in which a transition metal ion changes its oxidation state?

Accepted Answer

Redox reaction

Answer

Complexation reaction

Answer

Ligand exchange reaction

Answer

Isomerization reaction

Question 18

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

Accepted Answer

Low electrical conductivity

Answer

High melting points

Answer

Variable oxidation states

Answer

Form colored compounds

Question 19

Distinguish between a cation and an anion.

Accepted Answer

Cations are positively charged, while anions are negatively charged

Answer

Cations are negatively charged, while anions are positively charged

Answer

Cations are neutral, while anions are charged

Answer

Anions are neutral, while cations are charged

Question 20

Which type of ligand can donate a pair of electrons to the metal ion to form a coordinate bond?

Accepted Answer

Anionic

Answer

Neutral

Answer

Cationic

Answer

Ambidentate

Question 21

What is the IUPAC name for the complex [Co(en)2Cl2]Br?

Accepted Answer

Diethylenediamminedichlorocobalt(II) bromide

Answer

Diethylenediamminedichlorocobalt(III) bromide

Answer

Tetraamminechloridocobalt(II) bromide

Answer

Tetraamminedichlorocobalt(III) bromide

Question 22

What is the d-electron configuration of Fe3+?

Accepted Answer

d0

Answer

d5

Answer

d6

Answer

d8

Question 23

What is the coordination geometry of the complex [Ni(NH3)6]2+?

Accepted Answer

Octahedral

Answer

Tetrahedral

Answer

Square planar

Answer

Trigonal bipyramidal

Question 24

Which spectroscopic technique can provide information about the electronic structure and oxidation state of transition metal ions?

Accepted Answer

UV-Vis spectroscopy

Answer

X-ray diffraction

Answer

Nuclear magnetic resonance spectroscopy

Answer

Electron paramagnetic resonance spectroscopy

Question 25

In coordination chemistry, ligands play an important role. Which of the following ligands exhibits strong-field behavior?

Accepted Answer

CN-

Answer

H2O

Answer

NH3

Answer

Cl-

Question 26

Electronic transitions within transition metal complexes are commonly observed. Which of the following transitions corresponds to a d-d transition?

Accepted Answer

d → s

Answer

n → π*

Answer

π → π*

Answer

s → d

Question 27

When assigning names to transition metal complexes according to IUPAC guidelines, what is the name of the complex ion [PtCl4]2-?

Accepted Answer

Tetrachloroplatinate(II) ion

Answer

Tetrachloroplatinate(IV) ion

Answer

Hexachloroplatinate(II) ion

Answer

Hexachloroplatinate(IV) ion

Question 28

Which factors play a crucial role in determining the stability of transition metal complexes?

Accepted Answer

Charge of the metal ion

Accepted Answer

Nature of the ligand

Accepted Answer

Number of d electrons in the metal ion

Answer

Temperature of the solution

Question 29

In redox reactions involving transition metals, which of the following statements accurately describes comproportionation and disproportionation reactions?

Accepted Answer

Comproportionation involves the self-reduction and self-oxidation of a species.

Accepted Answer

Disproportionation entails the simultaneous oxidation and reduction of a species.

Answer

Transition metals exclusively act as oxidizing agents.

Answer

Transition metals cannot participate in redox reactions in acidic conditions.

Question 30

Which of the following is characteristic of transition metals?

Accepted Answer

Variable oxidation states

Answer

Inability to form complexes

Answer

High density

Answer

Poor electrical conductivity

Question 31

In the case of transition metals, what does the term 'oxidation state' refer to?

Accepted Answer

The numerical charge carried by the metal ion

Answer

The valency of the metal

Answer

The number of electrons in the d-orbitals

Question 32

Which of the following elements is a transition metal that can exhibit variable oxidation states?

Accepted Answer

Iron

Answer

Magnesium

Answer

Sodium

Question 33

In the complex ion [Fe(CN)6]4-, what is the coordination number of the metal ion?

Accepted Answer

6

Answer

4

Answer

10

Answer

8

Question 34

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

Accepted Answer

CN-

Answer

Cl-

Answer

H2O

Answer

NH3

Question 35

What is the catalytic role of transition metals in chemical reactions?

Accepted Answer

Providing an alternative pathway for the reaction to occur

Answer

Decreasing the enthalpy change of the reaction

Answer

Increasing the activation energy of the reaction

Question 36

Which of the following is a characteristic of high-spin octahedral complexes?

Accepted Answer

Paramagnetism

Answer

Low energy absorption

Answer

Square planar geometry

Answer

Diamagnetism

Question 37

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

Accepted Answer

Pentaamminechlorocobalt(II) ion

Answer

Tetraamminechlorocobalt(II) ion

Answer

Hexaamminecobalt(II) ion

Answer

Chloropentaamminecobalt(II) ion

Question 38

In catalysis, what is the role of transition metals?

Accepted Answer

They provide an alternative pathway for reactions to occur, lowering the activation energy.

Answer

They decrease the rate of reactions.

Answer

They increase the activation energy of reactions.

Question 39

What is the electron configuration of the scandium ion, Sc3+?

Accepted Answer

[Ar]3d0

Answer

[Ar]4s23d1

Answer

[Ar]3d5

Answer

[Ar]3d3

Question 40

Which element among the given options is a d-block element?

Accepted Answer

Copper

Answer

Chlorine

Answer

Sodium

Answer

Oxygen

Question 41

Which of the following transition metals is typically NOT used as a catalyst?

Accepted Answer

Gold (Au)

Answer

Iron (Fe)

Answer

Platinum (Pt)

Answer

Nickel (Ni)

Question 42

What is the oxidation state of manganese in the permanganate ion (MnO₄⁻)?

Accepted Answer

+7

Answer

+4

Answer

+2

Answer

+6

Question 43

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

Accepted Answer

They form colored compounds.

Answer

They are generally non-reactive.

Answer

They have low melting points.

Answer

They are always found in their elemental form.

Question 44

The formation of a complex ion involves a transition metal ion accepting a lone pair of electrons from a...

Accepted Answer

Ligand

Answer

Hydrogen atom

Answer

Another ligand

Answer

Non-metal atom

Question 45

Which transition metal is commonly used in the production of stainless steel?

Accepted Answer

Chromium (Cr)

Answer

Copper (Cu)

Answer

Silver (Ag)

Answer

Zinc (Zn)

Question 46

What is the coordination number of the central copper ion in the complex ion [Cu(NH₃)₄]²⁺?

Accepted Answer

4

Answer

8

Answer

2

Answer

6

Question 47

The ability of transition metals to have multiple oxidation states is mainly due to...

Accepted Answer

The presence of partially filled d-orbitals.

Answer

Their high electronegativity.

Answer

Their large atomic radii.

Answer

Their ability to form covalent bonds.

Question 48

Which of these is NOT a common ligand found in coordination complexes?

Accepted Answer

Carbon dioxide (CO₂)

Answer

Water (H₂O)

Answer

Ammonia (NH₃)

Answer

Chloride ion (Cl⁻)

Question 49

A catalyst speeds up a reaction by...

Accepted Answer

Providing an alternative reaction pathway with lower activation energy.

Answer

Changing the equilibrium position of the reaction.

Answer

Increasing the temperature of the reaction.

Answer

Increasing the concentration of reactants.

Question 50

Which of the following transition metal compounds is used in chemotherapy to treat cancer?

Accepted Answer

Cisplatin

Answer

Titanium dioxide

Answer

Hemoglobin

Answer

Iron oxide