Inorganic Chemistry Learning Quizzes: Master the Fundamentals

Question 1

Identify the correct molecular geometry of the coordination complex [Fe(CN)6]4-:

Accepted Answer

Octahedral

Answer

Tetrahedral

Answer

Square planar

Answer

Trigonal bipyramidal

Question 2

Determine the oxidation state of chromium in the compound K2Cr2O7.

Accepted Answer

+6

Answer

+2

Answer

+3

Answer

+7

Question 3

Which of the following is NOT a type of intermolecular force?

Accepted Answer

Covalent bonding

Answer

van der Waals forces

Answer

Hydrogen bonding

Answer

Dipole-dipole forces

Question 4

Identify the characteristic of a strong ligand:

Accepted Answer

High stability constant

Answer

Low selectivity

Answer

Slow reaction kinetics

Answer

Low solubility in organic solvents

Question 5

Which oxidation state is NOT exhibited by manganese in its inorganic compounds?

Accepted Answer

-1

Answer

+2

Answer

+4

Answer

+6

Question 6

Which of the following interactions occurs between molecules but is not considered an intermolecular force?

Accepted Answer

Metallic bonding

Answer

Hydrogen bonding

Answer

Ion-dipole interaction

Answer

Van der Waals force

Question 7

Which of the following statements about the geometry of coordination complexes is **not** true?

Accepted Answer

Octahedral geometry is the only possible geometry for coordination complexes.

Answer

The geometry of a coordination complex depends on the number and type of ligands.

Answer

The geometry of a coordination complex can affect its properties, such as color and stability.

Question 8

In coordination complexes, ligands play a crucial role. Which of the following statements best describes their function?

Accepted Answer

Ligands donate electron pairs to the central metal ion.

Answer

Ligands receive electron pairs from the central metal ion.

Answer

Ligands are positively charged species that interact with the negatively charged central metal ion.

Question 9

Which property is characteristic of transition metal complexes?

Accepted Answer

Paramagnetic behavior

Answer

Colorless appearance

Answer

Low solubility in water

Answer

Formation of only ionic bonds

Question 10

What is the coordination sphere of a metal ion?

Accepted Answer

The area around the metal ion where ligands can bind.

Answer

The number of ligands attached to the metal ion.

Answer

The specific types of ligands bonded to the metal ion.

Answer

The electrical charge of the metal ion.

Question 11

Which property is characteristic of transition metal compounds?

Accepted Answer

Formation of colored solutions

Answer

Diamagnetic nature

Answer

Excellent electrical conductivity in solid state

Answer

High water solubility

Question 12

Identify the option that does NOT represent a type of intermolecular force:

Accepted Answer

(c) Covalent bonding

Answer

(a) Dipole-dipole interactions

Answer

(b) Hydrogen bonding

Answer

(d) van der Waals forces

Question 13

Identify the reaction that involves a redox process:

Accepted Answer

2Ag+ + Cu → 2Ag + Cu2+

Answer

Fe2+ + 2OH- → Fe(OH)2

Answer

NaOH + HCl → NaCl + H2O

Answer

2NH3 + H2SO4 → (NH4)2SO4

Question 14

Give an example of an organometallic compound and describe its characteristics.

Accepted Answer

Fe(CO)5

Answer

CH3CH2CH2NH2

Answer

NaCl

Answer

H2O

Question 15

For a complex with a d8 metal ion and four monodentate ligands, what is the expected molecular geometry?

Accepted Answer

Square planar

Answer

Tetrahedral

Answer

Octahedral

Answer

Trigonal bipyramidal

Question 16

What is the primary role of a catalyst in an inorganic reaction?

Accepted Answer

To increase the rate of the reaction without being consumed

Answer

To decrease the rate of the reaction

Answer

To change the equilibrium position of the reaction

Answer

To provide an alternative reaction pathway

Question 17

Which of the following properties is a characteristic of inorganic compounds?

Accepted Answer

Tend to form crystals

Answer

Have low melting and boiling points

Answer

Are soluble in organic solvents

Answer

Are highly reactive

Question 18

What type of chemical bonding is present in NaCl?

Accepted Answer

Ionic

Answer

Covalent

Answer

Metallic

Answer

Hydrogen

Question 19

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

Accepted Answer

6

Answer

4

Answer

8

Answer

12

Question 20

Which of the following is an example of an organometallic compound?

Accepted Answer

Fe(CO)5

Answer

CH3OH

Answer

NaCl

Answer

H2SO4

Question 21

Which of the following is considered a weak field ligand?

Accepted Answer

H2O

Answer

Cl-

Answer

CN-

Answer

NH3

Question 22

Which of the following species acts as a reducing agent?

Accepted Answer

NaBH4

Answer

KMnO4

Answer

Cr2O72-

Answer

H2O2

Question 23

Which of the following is NOT a defining feature of a coordination complex?

Accepted Answer

Always exhibits a coordination sphere of six ligands

Answer

Contains a central metal ion

Answer

Has ligands bound to the metal ion

Answer

Is typically charged

Question 24

The coordination sphere of [Fe(NH3)6]2+ is represented as:

Accepted Answer

{FeN6}

Answer

{Fe(NH3)6}

Question 25

Which of the following is a strong-field ligand?

Accepted Answer

CN-

Answer

H2O

Answer

Cl-

Answer

NH3

Question 26

An example of an organometallic compound is:

Accepted Answer

Ferrocene

Answer

Sodium chloride

Answer

Water

Answer

Carbon dioxide

Question 27

The IUPAC name of the coordination compound Ni(CO)4 is:

Accepted Answer

Nickel tetracarbonyl

Answer

Tetracarbonylnickel

Question 28

The EAN rule states that in stable molecules:

Accepted Answer

The sum of valence electrons equals the number of electrons in the nearest noble gas

Answer

The number of valence electrons must be even

Answer

The number of valence electrons must be odd

Answer

The number of valence electrons must be divisible by 8

Question 29

Which of the following ions is paramagnetic?

Accepted Answer

Fe3+

Answer

Na+

Answer

Mg2+

Answer

Zn2+

Question 30

Determine the coordination number of the metal ion in the complex ion K4[Fe(CN)6].

Accepted Answer

6

Answer

4

Answer

5

Answer

7

Question 31

Determine the molecular geometry of the [Ni(CN)4]2- ion.

Accepted Answer

Square planar

Answer

Tetrahedral

Answer

Octahedral

Answer

Trigonal pyramidal

Question 32

Identify the redox reaction involving an inorganic compound from the following options.

Accepted Answer

2Fe3+ + 2I- → 2Fe2+ + I2

Answer

NaOH + HCl → NaCl + H2O

Answer

NH3 + H+ → NH4+

Answer

CH4 + 2O2 → CO2 + 2H2O

Question 33

Which of the following is NOT a type of coordination compound?

Accepted Answer

Organic complex

Answer

Mononuclear complex

Answer

Trinuclear complex

Answer

Polynuclear complex

Question 34

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

Accepted Answer

Carbon monoxide (CO)

Answer

Chloride ion (Cl-)

Answer

Ammonia (NH3)

Answer

Water (H2O)

Question 35

What is the IUPAC name for the compound Fe2O3?

Accepted Answer

Iron(III) oxide

Answer

Iron(II) oxide

Answer

Iron oxide

Answer

Ferrous oxide

Question 36

What type of chemical bond is present in the compound Na+Cl-?

Accepted Answer

Ionic bond

Answer

Covalent bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 37

Which of the following species acts as a Lewis acid?

Accepted Answer

Boron trifluoride (BF3)

Answer

Ammonia (NH3)

Answer

Water (H2O)

Answer

Hydroxide ion (OH-)

Question 38

What is the primary coordination sphere of the complex [Cr(H2O)6]^3+?

Accepted Answer

Primary coordination sphere

Answer

Inner coordination sphere

Answer

Outer coordination sphere

Answer

Secondary coordination sphere

Question 39

Which of the following elements is a d-block element?

Accepted Answer

Iron

Answer

Sodium

Answer

Chlorine

Answer

Oxygen

Question 40

Which of the following ligands is classified as a strong field ligand?

Accepted Answer

CO

Answer

H2O

Answer

Cl-

Answer

NH3

Question 41

The hybridization of the central metal ion in [Ni(CN)4]2- is:

Accepted Answer

sp3d2

Answer

sp3

Answer

d2sp3

Answer

dsp3

Question 42

The IUPAC name for the complex [Co(NH3)5Cl]Cl2 is:

Accepted Answer

Pentaamminechlorocobalt(III) chloride

Answer

Chloroamminepentacobalt(III) chloride

Answer

Pentaamminecobalt(III) chloride

Answer

Chloropentaamminecobalt(III)

Question 43

Which of the following is NOT an example of an organometallic compound?

Accepted Answer

Sodium acetate

Answer

Ferrocene

Answer

Methyllithium

Answer

Dichlorotris(triphenylphosphine)ruthenium(II)

Question 44

Which of the following is a characteristic reaction type for organometallic compounds?

Accepted Answer

Oxidative addition

Answer

Metathesis

Answer

Nucleophilic attack

Answer

Electrophilic addition

Question 45

Which of the following ligands can form both sigma and pi bonds to a metal ion?

Accepted Answer

Carbon monoxide (CO)

Answer

Ammonia (NH3)

Answer

Chloride ion (Cl-)

Answer

Water (H2O)

Question 46

Which of the following is an example of an organometallic compound?

Accepted Answer

Iron pentacarbonyl [Fe(CO)5]

Answer

Sodium chloride (NaCl)

Answer

Methanol (CH3OH)

Answer

Sulfuric acid (H2SO4)

Question 47

Determine the IUPAC name for the compound K2[PtCl4].

Accepted Answer

Potassium tetrachloroplatinate(II)

Answer

Potassium tetrachloroplatinate(IV)

Answer

Potassium hexachloroplatinate(II)

Answer

Potassium hexachloroplatinate(IV)

Question 48

Determine the coordination number of the metal ion in the complex ion [Co(en)3]^3+.

Accepted Answer

6

Answer

4

Answer

5

Answer

7

Question 49

Which of the following compounds exhibits resonance?

Accepted Answer

NO2

Answer

CO2

Answer

SO2

Answer

O2

Question 50

Identify the strongest type of intermolecular force present in liquid HF.

Accepted Answer

Hydrogen bonding

Answer

Dipole-dipole interactions

Answer

London dispersion forces

Answer

Ion-dipole interactions

Question 51

Which characteristic is unique to transition metals?

Accepted Answer

Variable oxidation states

Answer

Low thermal conductivity

Answer

Brittleness

Answer

High melting points

Question 52

Determine the oxidation state of sulfur in H2SO4.

Accepted Answer

+6

Answer

-2

Answer

-6

Answer

+4

Question 53

Identify the reaction that exemplifies a redox reaction.

Accepted Answer

2Fe + 3Cl2 → 2FeCl3

Answer

CH4 + 2O2 → CO2 + 2H2O

Answer

AgNO3 + NaCl → AgCl + NaNO3

Answer

NaOH + HCl → NaCl + H2O

Question 54

Provide the IUPAC name for the coordination complex [Co(NH3)5Cl]Cl2.

Accepted Answer

Pentaamminechlorocobalt(III) chloride

Answer

Chloroamminepentacobalt(III) chloride

Answer

Pentammoniumchlorocobalt(II) chloride

Question 55

Which species acts as a Lewis acid?

Accepted Answer

BF3

Answer

H2O

Answer

CH4

Answer

NH3

Question 56

Describe the crystal structure of NaCl.

Accepted Answer

Face-centered cubic

Answer

Tetragonal

Answer

Body-centered cubic

Answer

Hexagonal close-packed

Question 57

What is the oxidation state of chromium in the dichromate ion, Cr2O72-?

Accepted Answer

+6

Answer

+3

Answer

+5

Answer

+4

Question 58

What is the systematic name for the compound with the formula Fe2O3?

Accepted Answer

Iron(III) oxide

Answer

Iron oxide

Answer

Iron(II) oxide

Answer

Ferrous oxide

Question 59

Which of the following is considered a weak acid?

Accepted Answer

H2CO3

Answer

HCl

Answer

HNO3

Answer

H2SO4

Question 60

Which of the following substances acts as a Lewis acid?

Accepted Answer

BF3

Answer

NH3

Answer

H2O

Answer

CH4

Question 61

Which of the following reactions represents a redox reaction?

Accepted Answer

2Fe + 3Cl2 → 2FeCl3

Answer

NH3 + HCl → NH4Cl

Answer

NaOH + HCl → NaCl + H2O

Answer

CaCO3 → CaO + CO2

Question 62

In the complex ion [Cr(NH3)4Cl2]+, the coordination sphere consists of:

Accepted Answer

Four NH3 molecules and two chloride ions

Answer

Two NH3 molecules and four chloride ions

Answer

Six NH3 molecules and two chloride ions

Answer

Four NH3 molecules and four chloride ions

Question 63

Identify the coordination complex from the given compounds:

Accepted Answer

[Ni(NH3)6]Cl2

Answer

H2SO4

Answer

CH4

Answer

NaCl

Question 64

Which of the following is classified as a strong-field ligand?

Accepted Answer

CN-

Answer

NH3

Answer

Cl-

Answer

H2O