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Essential Chemistry for IGCSE - Acids And Bases (Section 4)

1
What are the two main products of a neutralization reaction?
Answer
(A)
Salt and water
2
What is the role of calcium hydroxide (lime water) in testing for carbon dioxide?
Answer
(C)
It turns cloudy
3
Which ion, if present in excess, makes a solution alkaline?
Answer
(C)
OH-
4
What is formed when an acid reacts with a base?
Answer
(B)
Salt and water
5
Which of the following oxides is considered amphoteric?
Answer
(C)
ZnO
6
Which is not a characteristic of acids?
Answer
(D)
Taste bitter
7
What happens to the pH when a base is added to water?
Answer
(B)
It increases
8
Which of the following are amphoteric oxides?
Answer
A
C
9
What is the color of methyl orange in an alkaline solution?
Answer
(B)
Yellow
10
Which of the following statements is true regarding acidic oxides?
Answer
(B)
They react with bases to form salt and water
11
What happens to the concentration of hydroxide ions when an acid is added to water?
Answer
(B)
It decreases.
12
What is the definition of a strong acid?
Answer
(B)
An acid that completely ionizes in water
13
Which substance is used to determine the pH of a solution?
Answer
(A)
Litmus paper
14
What is an example of a strong acid?
Answer
(C)
Hydrochloric acid
15
What type of oxide is carbon dioxide?
Answer
(A)
Acidic
16
What is the relationship between the concentration of hydrogen ions and pH?
Answer
(B)
Inversely proportional
17
What will happen to the pH of a solution when a base is added to it?
Answer
(A)
Increase
18
Which ion is associated with bases, and thus present in higher concentrations in a basic solution?
Answer
(C)
OH-
19
What is the name of the process where a base dissolves in water?
Answer
(A)
Dissociation
20
What is the name of the acid found in lemons?
Answer
(B)
Citric acid
21
What is formed when a base reacts with ammonium salt?
Answer
(C)
Ammonia gas
22
Which of the following is a strong acid?
Answer
(B)
HCl
23
Which of the following statements is true about the reaction of acids with carbonates?
Answer
(B)
They produce salt, water, and carbon dioxide.
24
What are the products of a reaction between an acid and a metal?
Answer
(C)
Salt and Hydrogen
25
Which of the following is a property of acids?
Answer
A
B
26
What is the pH of pure water at room temperature?
Answer
(B)
7
27
What type of reaction occurs when an acid and a base combine to form salt and water?
Answer
(C)
Neutralization
28
If a substance has a pH of 1, it is:
Answer
(A)
Strongly acidic
29
Which of the following is considered an alkali?
Answer
(B)
NaOH
30
Which type of oxides react with both acids and bases?
Answer
(D)
Amphoteric oxides
31
What would be produced in the reaction of magnesium with hydrochloric acid?
Answer
(A)
Magnesium chloride and hydrogen gas.
32
Which of the following is NOT a property of bases?
Answer
(D)
React with acids to produce hydrogen
33
What is the pH of a strong acid?
Answer
(C)
Below 7
34
Which of the following will react with water to form an alkaline solution?
Answer
(C)
Na2O
35
Which of the following is NOT a property of acids?
Answer
(D)
They feel slippery.
36
In the context of acids and bases, what is a proton donor?
Answer
(A)
An acid
37
Which of the following acids is found in the stomach?
Answer
(B)
Hydrochloric Acid
38
Which of the following is the formula for hydrochloric acid?
Answer
(B)
HCl
39
Which of the following is an example of a neutralization reaction?
Answer
(B)
Acid + Base -> Salt + Water
40
What is produced when an acid reacts with a carbonate?
Answer
(C)
Salt, water, and carbon dioxide
41
What does the word amphoteric mean in the context of oxides?
Answer
(C)
They have acidic and basic properties.
42
Which of the following would indicate the weakest acidic solution?
Answer
(D)
pH 6.9
43
If the concentration of hydrogen ions is increased in a solution, what happens to the pH?
Answer
(B)
The pH decreases
44
What is the name given to the reaction of a base with an ammonium salt?
Answer
(A)
Neutralization
45
Which of these compounds would be considered an alkali?
Answer
(B)
KOH
46
What is the name given to a substance that can accept a proton?
Answer
(B)
Base
47
What is the pH of a substance which has more hydroxide ions (OH-) than hydrogen ions (H+)?
Answer
(C)
Greater than 7
48
Which of the following is the general formula for the reaction of an acid with a metal?
Answer
(A)
Acid + Metal -> Salt + Hydrogen
49
What color does methyl orange indicator turn in an acidic solution?
Answer
(B)
Red
50
What is the role of a proton in the context of acids and bases?
Answer
(C)
A hydrogen ion (H+) donor