Inorganic Chemistry Quizzes: Test Your Knowledge of Inorganic Compounds

Question 1

What is the oxidation state of nitrogen in nitric acid, HNO3?

Accepted Answer

+5

Answer

+1

Answer

+2

Answer

+3

Question 2

What is the coordination sphere of a metal complex?

Accepted Answer

The central metal ion and the ligands directly bonded to it

Answer

All ions in the solution surrounding the metal complex

Answer

Only the positively charged ions surrounding the metal complex

Answer

Only the negatively charged ions surrounding the metal complex

Question 3

Identify the correct name for the compound Fe2O3:

Accepted Answer

Iron(III) oxide

Answer

Iron(II) oxide

Answer

Iron(IV) oxide

Answer

Ferrous oxide

Question 4

Which of the following reactions is classified as a redox reaction?

Accepted Answer

Combustion reaction

Answer

Acid-base reaction

Answer

Precipitation reaction

Answer

Neutralization reaction

Question 5

Determine the coordination number of the metal ion in the complex ion [Co(NH3)6]Cl3.

Accepted Answer

6

Answer

4

Answer

8

Answer

12

Question 6

Identify the redox reaction from the following options:

Accepted Answer

2Na + Cl2 -> 2NaCl

Answer

NaOH + HCl -> NaCl + H2O

Answer

CaCO3 -> CaO + CO2

Answer

NH3 + HCl -> NH4Cl

Question 7

Determine the hybridization of the central atom in the molecule SF6.

Accepted Answer

sp3d2

Answer

sp

Answer

sp2

Answer

sp3

Question 8

Identify the compound that is insoluble in water:

Accepted Answer

BaSO4

Answer

NaCl

Answer

KCl

Answer

NH4Cl

Question 9

What type of bonding is commonly found in ionic inorganic compounds?

Accepted Answer

Ionic bonding

Answer

Covalent bonding

Answer

Metallic bonding

Answer

Hydrogen bonding

Question 10

Which of the following elements is classified as a metalloid?

Accepted Answer

Silicon

Answer

Sodium

Answer

Chlorine

Answer

Potassium

Question 11

Which of the following is considered a strong acid?

Accepted Answer

Hydrochloric acid

Answer

Acetic acid

Answer

Carbonic acid

Answer

Phosphoric acid

Question 12

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 13

Which of the following is a reducing agent?

Accepted Answer

Hydrogen

Answer

Sodium

Answer

Chlorine

Answer

Oxygen

Question 14

What is the chemical formula for sodium chloride?

Accepted Answer

NaCl

Answer

Na2Cl

Answer

NaCl2

Answer

Na2Cl2

Question 15

How would you describe the primary function of Lewis structures in inorganic chemistry?

Accepted Answer

Lewis structures serve as visual depictions of electron-pair bonding in inorganic compounds.

Answer

Lewis structures are only applicable to organic compounds.

Answer

Lewis structures accurately convey the three-dimensional structure of inorganic compounds.

Question 16

Which inorganic compound is vital for life processes and acts as the main energy source in cells?

Accepted Answer

ATP

Answer

Sodium chloride

Answer

Water

Question 17

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

Accepted Answer

Sodium chloride (NaCl)

Answer

Methane (CH4)

Answer

Water (H2O)

Answer

Carbon dioxide (CO2)

Question 18

What is the approximate pH of a 0.1 M solution of hydrochloric acid?

Accepted Answer

1

Answer

7

Answer

10

Answer

14

Question 19

What is the general formula of a compound formed between a metal and a non-metal?

Accepted Answer

MX

Answer

M2X

Answer

MX2

Answer

M3X2

Question 20

Which of the following is a strong electrolyte?

Accepted Answer

Sodium chloride (NaCl)

Answer

Pure water (H2O)

Answer

Ethanol (C2H5OH)

Answer

Sugar (C12H22O11)

Question 21

What is the major product of the reaction between sodium hydroxide and nitric acid?

Accepted Answer

Sodium nitrate (NaNO3) and water (H2O)

Answer

Sodium chloride (NaCl) and water (H2O)

Answer

Sodium oxide (Na2O) and water (H2O)

Answer

Sodium sulfide (Na2S) and water (H2O)

Question 22

Which characteristic is NOT associated with inorganic compounds?

Accepted Answer

Typically soluble in water

Answer

Absence of carbon-hydrogen bonds

Answer

Presence of metals or metalloids

Answer

Covalent bonding

Question 23

Inorganic compounds predominantly exhibit which type of bonding?

Accepted Answer

Ionic

Answer

Covalent

Answer

Metallic

Answer

Hydrogen

Question 24

Which of the following is an example of an inorganic acid?

Accepted Answer

Hydrochloric acid

Answer

Acetic acid

Answer

Citric acid

Answer

Lactic acid

Question 25

What is the hybridization of the central atom in SF6?

Accepted Answer

sp3d

Answer

sp

Answer

sp2

Answer

sp3

Question 26

Determine the coordination number of the metal ion in [Fe(CN)6]4-.

Accepted Answer

6

Answer

4

Answer

8

Answer

10

Question 27

Which species acts as a Lewis acid?

Accepted Answer

H+

Answer

NH3

Answer

Cl-

Answer

CH4

Question 28

What molecular shape is adopted by XeF4?

Accepted Answer

Square planar

Answer

Linear

Answer

Trigonal planar

Answer

Tetrahedral

Question 29

Calculate the molar mass of calcium carbonate (CaCO3).

Accepted Answer

150 g/mol

Answer

50 g/mol

Answer

100 g/mol

Answer

200 g/mol

Question 30

How do ligands affect coordination complexes? Explain their impact on stability and properties.

Accepted Answer

Ligands donate electron pairs to the metal ion, forming coordinate bonds and increasing complex stability.

Answer

Ligands decrease the number of electrons in the metal ion's d-orbitals, reducing complex stability.

Answer

Ligands have no effect on coordination complex properties.

Answer

Ligands are only found in organic compounds.

Question 31

Identify the characteristic that distinguishes inorganic compounds from organic compounds.

Accepted Answer

Presence of carbon atoms

Answer

Formation of ionic bonds

Answer

Covalent nature

Answer

Generally high reactivity

Question 32

In the compound K2Cr2O7, what is the oxidation state of chromium?

Accepted Answer

+6

Answer

+2

Answer

+3

Answer

+7

Question 33

Classify the following acid as either strong or weak: Acetic acid.

Accepted Answer

Weak acid

Answer

Strong acid

Question 34

Determine the coordination number of the central metal ion in the complex [Fe(CN)6]4-.

Accepted Answer

6

Answer

4

Answer

8

Answer

10

Question 35

Identify the element that belongs to the transition metal group.

Accepted Answer

Iron

Answer

Potassium

Answer

Fluorine

Answer

Argon

Question 36

Identify the substance that acts as a reducing agent in the following reaction: 2KMnO4 + 10FeSO4 + 8H2SO4 → K2SO4 + 2MnSO4 + 5Fe2(SO4)3 + 8H2O

Accepted Answer

FeSO4

Answer

KMnO4

Answer

H2SO4

Answer

Fe2(SO4)3

Question 37

Determine the pH of a 0.1 M solution of hydrochloric acid.

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 38

In the redox reaction: 2FeCl3(aq) + SnCl2(aq) → 2FeCl2(aq) + SnCl4(aq), which species is oxidized and which species is reduced?

Accepted Answer

FeCl3 is oxidized; SnCl2 is reduced.

Answer

FeCl3 is reduced; SnCl2 is oxidized.

Answer

Both FeCl3 and SnCl2 are oxidized.

Answer

Both FeCl3 and SnCl2 are reduced.

Question 39

Identify the hybridization of the central atom in XeF4.

Accepted Answer

sp3d2

Answer

sp

Answer

sp2

Answer

sp3d

Question 40

Which of the following characteristics is NOT typically associated with ionic compounds?

Accepted Answer

Covalent bonding

Answer

Solubility in water

Answer

High melting points

Question 41

Which of the following is NOT a characteristic of alkali metals?

Accepted Answer

High electronegativity

Answer

Shiny appearance

Answer

Low ionization energy

Answer

Reactivity with water

Question 42

What type of bonding is present in sodium chloride (NaCl)?

Accepted Answer

Ionic bonding

Answer

Metallic bonding

Answer

Covalent bonding

Question 43

Which of the following options is NOT classified as a transition metal?

Accepted Answer

Zinc

Answer

Iron

Answer

Copper

Answer

Nickel

Question 44

Determine the coordination number of the metal ion in the complex ion [Fe(CN)6]4-.

Accepted Answer

6

Answer

8

Answer

10

Answer

4

Question 45

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

Accepted Answer

2Fe + 3Cl2 -> 2FeCl3

Answer

NH3 + HCl -> NH4Cl

Answer

NaCl + AgNO3 -> AgCl + NaNO3

Answer

CaCO3 -> CaO + CO2

Question 46

What is the hybridization of the carbon atom in methane?

Accepted Answer

sp3

Answer

sp

Answer

sp2

Question 47

Which of the following is an organic compound?

Accepted Answer

Ethene

Answer

Sodium chloride

Answer

Water

Answer

Carbon dioxide

Question 48

Which of the following is NOT a characteristic of ionic compounds?

Accepted Answer

Solubility in organic solvents

Answer

Crystalline structure

Answer

Conduct electricity when molten or dissolved

Answer

High melting and boiling points

Question 49

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

Accepted Answer

6

Answer

12

Answer

8

Answer

4

Question 50

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

Accepted Answer

Zn + 2HCl -> ZnCl2 + H2

Answer

NaOH + HCl -> NaCl + H2O

Answer

NaCl + AgNO3 -> AgCl + NaNO3

Question 51

Which of the following is a Lewis acid?

Accepted Answer

BF3

Answer

H2O

Answer

NaOH

Answer

NH3

Question 52

What is the hybridization of the carbon atom in methane (CH4)?

Accepted Answer

sp3

Answer

sp2

Answer

sp

Answer

sp3d

Question 53

Which of the following is a transition metal?

Accepted Answer

Iron

Answer

Oxygen

Answer

Chlorine

Answer

Sodium