Acids, Bases and Salts: Interactive Learning Quizzes for Healthcare Professionals

Question 1

Which reaction accurately represents a neutralization reaction?

Accepted Answer

NaOH + HCl → NaCl + H2O

Answer

MgO + H2SO4 → MgSO4 + H2O

Answer

CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4

Answer

NH3 + H2O → NH4+ + OH-

Question 2

Determine the formula of the salt formed when sulfuric acid reacts with sodium hydroxide.

Accepted Answer

Na2SO4

Answer

Na2SO3

Answer

NaHSO4

Answer

NaOH

Question 3

Calculate the molarity of a solution containing 0.5 moles of NaOH in 1 liter of solution.

Accepted Answer

0.5 M

Answer

0.25 M

Answer

1 M

Answer

2 M

Question 4

Which compound possesses the highest boiling point?

Accepted Answer

CH3CH2CH2CH2OH

Answer

CH3OH

Answer

CH3CH2OH

Answer

CH3CH2CH2OH

Question 5

Which of the following statements best describes an acid?

Accepted Answer

A substance that produces hydrogen ions (H+ ions) when dissolved in water.

Answer

A substance that accepts hydroxide ions (OH- ions) when dissolved in water.

Answer

A substance that has a pH greater than 7.

Answer

A substance that neutralizes bases.

Question 6

According to the Bronsted-Lowry theory, an acid is a substance that:

Accepted Answer

Donates protons (H+ ions).

Answer

Accepts protons (H+ ions).

Answer

Releases hydroxide ions (OH- ions).

Answer

Neutralizes bases.

Question 7

What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-7 mol/L?

Accepted Answer

7

Answer

0

Answer

14

Answer

Insufficient information provided to determine the pH.

Question 8

Which of the following reactions is NOT a neutralization reaction?

Accepted Answer

2HCl + Mg → MgCl2 + H2

Answer

NaOH + HCl → NaCl + H2O

Answer

Na2CO3 + 2HCl → 2NaCl + H2O + CO2

Answer

NH3 + HNO3 → NH4NO3

Question 9

What is the salt formed when sulfuric acid reacts with sodium hydroxide?

Accepted Answer

Sodium sulfate

Answer

Sodium hydrogen sulfate

Answer

Sulfuric acid sodium

Answer

Sodium hydroxide sulfate

Question 10

What is the conjugate acid of ammonia?

Accepted Answer

Ammonium ion

Answer

Hydrogen ion

Answer

Water

Answer

Hydroxide ion

Question 11

According to the Arrhenius theory, what is the key difference in the definition of an acid compared to the Bronsted-Lowry theory?

Accepted Answer

Arrhenius defines acids as proton donors, while Bronsted-Lowry defines acids as proton donors or hydroxide acceptors.

Answer

Arrhenius defines acids as hydroxide acceptors, while Bronsted-Lowry defines acids as proton donors.

Answer

Arrhenius and Bronsted-Lowry provide identical definitions of an acid, with no distinction between them.

Question 12

How do buffer solutions maintain pH stability when small amounts of acid or base are added?

Accepted Answer

By adjusting the equilibrium to form more weak acid or conjugate base, as needed, to neutralize the added acid or base.

Answer

By fully neutralizing added acids or bases, preventing any pH change.

Answer

By blocking the dissociation of the weak acid or its conjugate base, preserving a constant pH.

Question 13

According to Arrhenius's theory, which of the following is the definition of an acid?

Accepted Answer

A substance that produces hydrogen ions (H+) when dissolved in water.

Answer

A substance that produces hydroxide ions (OH-) when dissolved in water.

Answer

A substance that has a pH less than 7.

Answer

A substance that donates electrons.

Question 14

Which of the following is a strong base?

Accepted Answer

Sodium hydroxide (NaOH)

Answer

Ammonia (NH3)

Answer

Acetic acid (CH3COOH)

Answer

Carbonic acid (H2CO3)

Question 15

What is the name of the salt produced when sodium hydroxide is neutralized with sulfuric acid?

Accepted Answer

Sodium sulfate

Answer

Potassium sulfate

Answer

Calcium sulfate

Answer

Magnesium sulfate

Question 16

What is the conjugate acid of NH3?

Accepted Answer

NH4+

Answer

NH2-

Answer

H+

Answer

OH-

Question 17

Which of the following is **not** a real-world application of acids and bases in the healthcare industry?

Accepted Answer

Food production

Answer

Drug development

Answer

Diagnostic procedures

Answer

Disinfection

Question 18

What does a pH value of 4.5 suggest about the nature of a solution?

Accepted Answer

Acidic

Answer

Neutral

Answer

Basic

Question 19

According to the Arrhenius theory, an acid is defined as a substance that donates:

Accepted Answer

Hydrogen ions (H+)

Answer

Hydroxide ions (OH-)

Answer

Electrons

Answer

Neutrons

Question 20

Which of the following is considered a strong base?

Accepted Answer

Sodium hydroxide (NaOH)

Answer

Acetic acid (CH3COOH)

Answer

Ammonia (NH3)

Answer

Carbonic acid (H2CO3)

Question 21

When acid reacts with a base, what substances are formed during this process?

Accepted Answer

Salt and water

Answer

Salt and hydrogen

Answer

Salt and oxygen

Answer

Water and carbon dioxide

Question 22

Among the given options, which substance is classified as a salt?

Accepted Answer

Sodium chloride (NaCl)

Answer

Hydrochloric acid (HCl)

Answer

Glucose (C6H12O6)

Answer

Calcium oxide (CaO)

Question 23

According to the Bronsted-Lowry theory, which action represents the characteristic of a base?

Accepted Answer

Accepts a proton (H+)

Answer

Donates a proton (H+)

Answer

Releases hydroxide ions (OH-)

Answer

Neutralizes acids

Question 24

A buffer solution can be described by which characteristic?

Accepted Answer

Stability in pH despite minor additions of acid or base

Answer

Ability to neutralize acids and bases

Answer

Color change in the presence of acids or bases

Answer

High concentration

Question 25

Based on the Bronsted-Lowry theory, a substance that accepts protons (H+) is classified as a:

Accepted Answer

Base

Answer

Acid

Answer

Salt

Answer

Buffer

Question 26

The term that describes the measurement of hydrogen ion concentration in a solution is:

Accepted Answer

pH

Answer

Molarity

Answer

Normality

Answer

Titration

Question 27

Which of the following chemical reactions represents a neutralization reaction?

Accepted Answer

Acid + Base → Salt + Water

Answer

Acid + Metal → Salt + Hydrogen

Answer

Base + Salt → Acid + Water

Answer

Salt + Metal → Acid + Base

Question 28

The salt formed by the reaction of sodium hydroxide (NaOH) and hydrochloric acid (HCl) is:

Accepted Answer

Sodium chloride (NaCl)

Answer

Sodium hydroxide (NaOH)

Answer

Hydrochloric acid (HCl)

Answer

Water (H2O)

Question 29

A solution with a pH value of 7 is considered to be:

Accepted Answer

Neutral

Answer

Acidic

Answer

Basic

Answer

Buffered

Question 30

Which of the following is considered a weak base?

Accepted Answer

Ammonium hydroxide (NH4OH)

Answer

Sodium hydroxide (NaOH)

Answer

Potassium hydroxide (KOH)

Answer

Calcium hydroxide (Ca(OH)2)

Question 31

According to the Arrhenius theory, what defines an acid?

Accepted Answer

A substance that produces hydrogen ions (H+) when dissolved in water.

Answer

A substance that produces hydroxide ions (OH-) when dissolved in water.

Answer

A substance that accepts hydrogen ions (H+) when dissolved in water.

Question 32

Which of these is NOT a characteristic of bases?

Accepted Answer

Bitter taste

Answer

Neutralization of acids

Answer

Turns litmus paper blue

Answer

Slippery feel

Question 33

What is the pH of a neutral solution?

Accepted Answer

7

Answer

14

Answer

10

Answer

0

Question 34

Which chemical equation represents a neutralization reaction?

Accepted Answer

Acid + Base -> Salt + Water

Answer

Acid + Acid -> Salt

Answer

Salt + Salt -> Acid + Base

Answer

Base + Base -> Salt

Question 35

What salt is formed when hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH)?

Accepted Answer

Sodium chloride (NaCl)

Answer

Sodium hydroxide (NaOH)

Answer

Hydrochloric acid (HCl)

Answer

Water (H2O)

Question 36

Which of the following is classified as a strong acid?

Accepted Answer

Hydrochloric acid (HCl)

Answer

Ammonia (NH3)

Answer

Carbonic acid (H2CO3)

Answer

Acetic acid (CH3COOH)

Question 37

Which of these is considered a weak base?

Accepted Answer

Ammonia (NH3)

Answer

Sodium hydroxide (NaOH)

Answer

Potassium hydroxide (KOH)

Answer

Calcium hydroxide (Ca(OH)2)

Question 38

What is a buffer solution?

Accepted Answer

A solution that resists changes in pH when small amounts of acid or base are added.

Answer

A solution with a pH of 7.

Answer

A solution containing a strong acid.

Question 39

According to the Arrhenius theory, which of the following is NOT a characteristic of acids?

Accepted Answer

Acids produce hydroxide ions (OH-) in solution.

Answer

Acids turn blue litmus paper red.

Answer

Acids react with bases to form salts and water.

Answer

Acids have a sour taste.

Question 40

Which of the following substances acts as a Brønsted-Lowry acid?

Accepted Answer

H2SO4

Answer

NH3

Answer

H2O

Answer

NaOH

Question 41

What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-4 M?

Accepted Answer

4

Answer

-4

Answer

14

Answer

10

Question 42

Which of the following solutions is the most acidic?

Accepted Answer

pH 1

Answer

pH 7

Answer

pH 14

Answer

pH 10

Question 43

A strong acid is characterized by its ability to:

Accepted Answer

Completely ionize in solution.

Answer

React violently with water.

Answer

Not ionize in solution.

Answer

Partially ionize in solution.

Question 44

What is the name of the salt formed when hydrochloric acid (HCl) reacts with sodium hydroxide (NaOH)?

Accepted Answer

Sodium chloride

Answer

Potassium chloride

Answer

Calcium chloride

Answer

Sodium sulfate

Question 45

Which of the following is NOT a typical property of salts?

Accepted Answer

They are always acidic.

Answer

They are formed from the reaction of acids and bases.

Answer

They are typically crystalline solids.

Answer

They can conduct electricity when dissolved in water.

Question 46

The main purpose of a buffer solution is to:

Accepted Answer

Resist changes in pH.

Answer

Increase the pH of a solution.

Answer

Decrease the pH of a solution.

Answer

Neutralize a strong acid or base.

Question 47

What are the products always formed in a neutralization reaction?

Accepted Answer

A salt and water.

Answer

A strong acid and a strong base.

Answer

Two acids.

Answer

Two bases.

Question 48

A solution with a pH of 2 is how many times more acidic than a solution with a pH of 4?

Accepted Answer

100 times

Answer

2 times

Answer

1000 times

Answer

10 times