Acids Bases and Salts Practice Questions
IGCSE (Cambridge) · IGCSE Chemistry · 137 free MCQs with instant results and detailed explanations.
137
Total
38
Easy
72
Medium
27
Hard
Start Practicing Acids Bases and Salts
Take a timed quiz or customize your practice session
Sample Questions from Acids Bases and Salts
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
What is the pH range of acids?
A.
0 to 7
B.
7 to 14
C.
7
D.
14 to 20
Show Answer & Explanation
Correct Answer: A
Acids have a pH less than 7, typically ranging from 0 to 6, indicating higher hydrogen ion concentration.
Q2
Easy
Which of the following substances is a strong acid?
A.
Sodium bicarbonate
B.
Hydrochloric acid
C.
Citric acid
D.
Acetic acid
Show Answer & Explanation
Correct Answer: B
Hydrochloric acid (HCl) is a strong acid that completely dissociates in water, while the others are weak acids.
Q3
Easy
What happens when an acid reacts with a base?
A.
They form only water.
B.
They form salt and water.
C.
They form hydrogen gas.
D.
They do not react with each other.
Show Answer & Explanation
Correct Answer: B
When an acid reacts with a base, they undergo a neutralization reaction, producing salt and water as products.
Q4
Medium
Which of the following substances is a strong acid?
A.
Acetic acid
B.
Hydrochloric acid
C.
Citric acid
D.
Carbonic acid
Show Answer & Explanation
Correct Answer: B
Hydrochloric acid is a strong acid because it completely dissociates in water, releasing all of its hydrogen ions.
Q5
Medium
If you add sodium bicarbonate to hydrochloric acid, what gas is produced?
A.
Oxygen
B.
Carbon dioxide
C.
Hydrogen
D.
Nitrogen
Show Answer & Explanation
Correct Answer: B
The reaction between sodium bicarbonate and hydrochloric acid produces carbon dioxide gas, water, and sodium chloride.
Q6
Medium
What happens to the pH of a solution if you dilute a strong acid?
A.
It increases
B.
It decreases
C.
It remains the same
D.
It fluctuates
Show Answer & Explanation
Correct Answer: A
Diluting a strong acid decreases its concentration, which leads to an increase in pH towards neutrality.
Q7
Medium
Which of the following salts is formed when hydrochloric acid reacts with sodium hydroxide?
A.
Sodium chloride
B.
Sodium bicarbonate
C.
Potassium chloride
D.
Calcium chloride
Show Answer & Explanation
Correct Answer: A
The reaction between hydrochloric acid (HCl) and sodium hydroxide (NaOH) produces sodium chloride (NaCl) and water, making NaCl the salt formed.
Q8
Hard
Which of the following statements accurately describes the pH scale?
A.
The pH scale ranges from 0 to 14, where 0 is neutral and 14 is highly acidic.
B.
A pH of 7 indicates a neutral solution, while values below 7 are acidic and above 7 are basic.
C.
Each whole number change on the pH scale represents a tenfold change in acidity or alkalinity.
D.
The pH scale is logarithmic, with only integer values representing acidity and alkalinity.
Show Answer & Explanation
Correct Answer: B
A pH of 7 indicates neutrality, while values below 7 indicate acidity and values above 7 indicate alkalinity. This is a fundamental concept in chemistry regarding acids and bases.
Q9
Hard
When hydrochloric acid (HCl) and sodium hydroxide (NaOH) react, what is the resulting product?
A.
Sodium chloride and water
B.
Hydrogen gas and salt
C.
Hydrochloric gas and sodium water
D.
Sodium acid and oxygen
Show Answer & Explanation
Correct Answer: A
The reaction between hydrochloric acid and sodium hydroxide is a neutralization reaction that produces sodium chloride (table salt) and water, a classic example of acid-base reactions.
Q10
Hard
Which of the following reactions demonstrates the neutralization process effectively?
A.
NaOH + HCl → NaCl + H2O
B.
CaCO3 + H2SO4 → CaSO4 + CO2 + H2O
C.
NH3 + HCl → NH4Cl
D.
H2SO4 + 2NaOH → Na2SO4 + 2H2O
Show Answer & Explanation
Correct Answer: A
Option A represents a classic neutralization reaction where an acid (HCl) reacts with a base (NaOH) to produce salt (NaCl) and water (H2O), clearly illustrating the neutralization process.
Showing 10 of 137 questions. Start a quiz to practice all questions with scoring and timer.
Practice All 137 Questions →Other IGCSE (Cambridge) Subjects
Acids Bases and Salts — IGCSE (Cambridge) IGCSE Chemistry Practice Questions Online
This page contains 137 practice MCQs for the chapter Acids Bases and Salts in IGCSE (Cambridge) IGCSE Chemistry. The questions are organized by difficulty — 38 easy, 72 medium, 27 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit.