Inorganic Chemistry Quizzes: Master the Chemistry of Elements and Metals

Question 1

Identify the type of ligand that forms a covalent bond with the metal ion.

Accepted Answer

Anionic

Answer

Cationic

Answer

Neutral

Answer

Zwitterionic

Question 2

What is the conjugate base of H2SO3?

Accepted Answer

HSO3-

Answer

SO3-

Answer

SO42-

Answer

H2SO4

Question 3

Which of the following reactions is an example of a nucleophilic substitution reaction?

Accepted Answer

CH3Br + NaOH → CH3OH + NaBr

Answer

CH3CH2Br + Mg → CH3CH2MgBr

Answer

CH3CH2OH + H2SO4 → CH3CH2OSO3H + H2O

Answer

CH3COOH + CH3OH → CH3COOCH3 + H2O

Question 4

When aqueous solutions of sodium hydroxide and iron(III) chloride react, which product is formed?

Accepted Answer

Iron(III) hydroxide

Answer

Iron(II) hydroxide

Answer

Sodium chloride

Answer

Sodium iron(III) chloride

Question 5

Which of the following elements has the highest electronegativity value?

Accepted Answer

Fluorine

Answer

Chlorine

Answer

Iodine

Answer

Bromine

Question 6

Determine the oxidation state of the chromium atom in the complex ion [Cr(NH3)6]Cl3.

Accepted Answer

+3

Answer

+2

Answer

-3

Answer

-2

Question 7

Identify the compound that acts as a Lewis acid.

Accepted Answer

BF3

Answer

NH3

Answer

H2O

Answer

NaOH

Question 8

What is the molecular geometry of the SF6 molecule?

Accepted Answer

Octahedral

Answer

Trigonal pyramidal

Answer

Tetrahedral

Answer

Bent

Question 9

Which of the following chemical reactions is a redox reaction?

Accepted Answer

2Na + Cl2 → 2NaCl

Answer

CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4

Answer

HNO3 + NaOH → NaNO3 + H2O

Answer

AgNO3 + NaCl → AgCl + NaNO3

Question 10

Calculate the pH of a 0.1 M solution of hydrochloric acid (HCl).

Accepted Answer

1

Answer

7

Answer

10

Answer

14

Question 11

Which element is a transition metal?

Accepted Answer

Iron

Answer

Sodium

Answer

Oxygen

Answer

Carbon

Question 12

Which substance is classified as a weak electrolyte?

Accepted Answer

Acetic acid

Answer

Hydrochloric acid

Answer

Sodium chloride

Answer

Potassium hydroxide

Question 13

Determine the hybridization of the carbon atom in methane (CH4).

Accepted Answer

sp3

Answer

p3

Answer

sp2

Answer

sp

Question 14

Which element among the following has the lowest electronegativity?

Accepted Answer

Francium

Answer

Oxygen

Answer

Chlorine

Answer

Fluorine

Question 15

A characteristic property of transition metals is:

Accepted Answer

Variable oxidation states

Answer

Low melting points

Answer

Non-reactivity

Answer

High electronegativity

Question 16

Which of the following is classified as a strong acid?

Accepted Answer

HCl

Answer

H2CO3

Answer

CH3COOH

Question 17

Identify the Lewis acid in the following:

Accepted Answer

BF3

Answer

H2O

Answer

NH3

Answer

CH4

Question 18

Which of the following is the most acidic?

Accepted Answer

HClO4

Answer

HBrO4

Answer

HIO4

Answer

H2SO4

Question 19

Which of the following elements is a transition metal?

Accepted Answer

Ni

Answer

Cl

Answer

Na

Question 20

Which of the following elements is NOT a noble gas?

Accepted Answer

Fluorine

Answer

Neon

Answer

Helium

Answer

Argon

Question 21

Which of the following compounds is formed by ionic bonding?

Accepted Answer

Sodium chloride (NaCl)

Answer

Water (H₂O)

Answer

Methane (CH₄)

Answer

Carbon dioxide (CO₂)

Question 22

Which of the following is a transition metal?

Accepted Answer

Copper (Cu)

Answer

Chlorine (Cl)

Answer

Oxygen (O)

Answer

Sodium (Na)

Question 23

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

Accepted Answer

6

Answer

4

Answer

8

Answer

10

Question 24

What is the hybridization of the central sulfur atom in the molecule SF₆?

Accepted Answer

sp³d²

Answer

sp

Answer

sp³

Answer

sp²d

Question 25

Which of the following acids is a strong acid?

Accepted Answer

Hydrochloric acid (HCl)

Answer

Carbonic acid (H₂CO₃)

Answer

Acetic acid (CH₃COOH)

Answer

Hydrofluoric acid (HF)

Question 26

Which of the following mixtures forms a buffer solution?

Accepted Answer

A mixture of a weak acid and its conjugate base

Answer

A solution of a strong base

Answer

A solution of a strong acid

Answer

A solution of pure water

Question 27

Which of the following correctly describes the trend in electronegativity across Period 3 of the periodic table?

Accepted Answer

Electronegativity increases from left to right.

Answer

Electronegativity decreases from left to right.

Answer

Electronegativity increases from right to left.

Answer

Electronegativity remains constant across the period.

Question 28

A coordination complex contains a central metal ion surrounded by ligands. Which of the following is NOT a characteristic of a ligand?

Accepted Answer

Ligands are always positively charged.

Answer

Ligands can be neutral molecules or ions.

Answer

Ligands are electron-pair donors.

Question 29

Which of the following elements is most likely to form a +2 ion?

Accepted Answer

Calcium (Ca)

Answer

Oxygen (O)

Answer

Chlorine (Cl)

Answer

Nitrogen (N)

Question 30

In the reaction of sodium with chlorine, the role of sodium is:

Accepted Answer

Reducing agent

Answer

Oxidizing agent

Answer

Catalyst

Answer

Acid

Question 31

Which of the following pairs of elements is most likely to form an ionic compound?

Accepted Answer

Sodium (Na) and Chlorine (Cl)

Answer

Nitrogen (N) and Oxygen (O)

Answer

Carbon (C) and Oxygen (O)

Answer

Hydrogen (H) and Oxygen (O)

Question 32

A transition metal complex with a coordination number of 6 would have how many ligands attached to the central metal ion?

Accepted Answer

Six

Answer

Four

Answer

Two

Question 33

Which of the following statements about the reactivity of alkali metals is CORRECT?

Accepted Answer

Alkali metals react readily with water to produce hydrogen gas.

Answer

Alkali metals are unreactive with water.

Answer

Alkali metals are less reactive than alkaline earth metals.

Question 34

The oxidation state of manganese in the permanganate ion (MnO4-) is:

Accepted Answer

+7

Answer

+2

Answer

+6

Answer

+4

Question 35

Which of the following compounds is an example of a complex ion?

Accepted Answer

[Cu(NH3)4]2+

Answer

CO2

Answer

H2O

Answer

NaCl

Question 36

In the reaction: Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g), what is the reducing agent?

Accepted Answer

CO

Answer

Fe

Answer

CO2

Answer

Fe2O3

Question 37

Which of the following elements is a noble gas?

Accepted Answer

Helium

Answer

Chlorine

Answer

Sodium

Answer

Carbon

Question 38

What is the oxidation state of iron in Fe2O3?

Accepted Answer

+3

Answer

+2

Answer

+4

Question 39

Which of the following is a Lewis acid?

Accepted Answer

BF3

Answer

NH3

Answer

H2O

Answer

NaOH

Question 40

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

Accepted Answer

6

Answer

4

Answer

8

Question 41

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

Accepted Answer

sp3

Answer

sp

Answer

sp3d

Answer

sp2

Question 42

Which of the following is a strong acid?

Accepted Answer

Hydrochloric acid (HCl)

Answer

Ammonia (NH3)

Answer

Acetic acid (CH3COOH)

Answer

Carbonic acid (H2CO3)

Question 43

What is the empirical formula of a compound that contains 40% carbon, 6.7% hydrogen, and 53.3% oxygen by mass?

Accepted Answer

C2H5O

Answer

C3H6O2

Answer

CH2O

Answer

C4H8O3

Question 44

Which of the following elements is the most electronegative?

Accepted Answer

Fluorine

Answer

Nitrogen

Answer

Chlorine

Answer

Oxygen

Question 45

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

Accepted Answer

6

Answer

10

Answer

8

Answer

4

Question 46

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

Accepted Answer

2Fe + 3Cl2 -> 2FeCl3

Answer

CaCO3 -> CaO + CO2

Answer

2NH3 + H2SO4 -> (NH4)2SO4

Answer

NaOH + HCl -> NaCl + H2O

Question 47

What is the hybridization of the central atom in the molecule SF6?

Accepted Answer

sp3d2

Answer

sp2

Answer

sp3

Question 48

Which of the following is a property of transition metals?

Accepted Answer

Variable oxidation states

Answer

Low melting points

Answer

Brittle

Answer

High density

Question 49

What is the IUPAC name of the compound Fe2O3?

Accepted Answer

Iron(III) oxide

Answer

Iron(III) hydroxide

Answer

Iron monoxide

Answer

Iron(II) oxide

Question 50

Which of the following is a Lewis acid?

Accepted Answer

BF3

Answer

OH-

Answer

NH3

Answer

H2O

Question 51

What is the pH of a 0.1 M solution of HCl?

Accepted Answer

1

Answer

10

Answer

7

Answer

2

Question 52

Which of the following statements about the reaction between magnesium and hydrochloric acid is correct?

Accepted Answer

It is an exothermic reaction that produces hydrogen gas.

Answer

It is a redox reaction in which magnesium is reduced.

Answer

It is an endothermic reaction that produces oxygen gas.

Question 53

What is the empirical formula of the compound C6H12O6?

Accepted Answer

CH2O

Answer

C4H8O4

Answer

C3H6O3

Answer

C2H4O2