Essential Chemistry for IGCSE - Metals And Reactivity (Section 4)
1
What is a key characteristic of thermal decomposition reactions?
Answer
(A)
Reactants break down when heated
2
Which metal hydroxide is most stable to heat?
Answer
(A)
Lithium Hydroxide
3
Why does aluminum appear unreactive?
Answer
(C)
Because it forms a protective oxide layer.
4
What are the products typically formed when a metal carbonate undergoes thermal decomposition?
Answer
(B)
Metal oxide and carbon dioxide
5
When a more reactive metal is added to a solution of a less reactive metal's salt, what happens to the more reactive metal?
Answer
(C)
It displaces the less reactive metal.
6
What is the product when carbon removes oxygen from copper(II) oxide?
Answer
(B)
Copper
7
Which factors affect the reactivity of metals?
Answer
B
C
8
Which properties best describe metals?
Answer
A
C
9
What happens to the reactivity of the Group 2 carbonates as you go down the group?
Answer
(B)
The reactivity increases.
10
In a displacement reaction, such as magnesium reacting with copper(II) sulfate, which of the following describes what happens to the more reactive metal?
Answer
(C)
It displaces the copper ions.
11
What gas is produced when most metals react with dilute hydrochloric acid?
Answer
(B)
Hydrogen
12
When a metal carbonate is heated, what is generally produced?
Answer
(B)
Metal oxide and carbon dioxide
13
Which of the following is NOT a characteristic property of metals?
Answer
(C)
Brittleness
14
Which property do metals like iron and aluminum exhibit?
Answer
(C)
They are opaque to light
15
Which of the following will react with dilute hydrochloric acid?
Answer
(C)
Zinc
16
What is the relationship between a metal's position in the reactivity series and its tendency to corrode?
Answer
(A)
The higher a metal is in the series, the more it is prone to corrosion.
17
What is the process called where electrons are lost during a chemical reaction?
Answer
(B)
Oxidation
18
The higher the metal is in the reactivity series, what happens?
Answer
(A)
The easier it is to corrode
19
Why does aluminum appear unreactive in many situations?
Answer
(C)
It forms a protective oxide layer on its surface.
20
What is the main advantage of using alloys instead of pure metals in many applications?
Answer
(C)
Alloys have improved properties like strength and hardness.
21
What are the expected products when iron reacts with steam?
Answer
B
C
22
In a displacement reaction, what will happen?
Answer
(A)
The more reactive metal will displace the ions of the less reactive metal.
23
What is the role of heat in the thermal decomposition process?
Answer
(D)
All of the above.
24
If a metal is high in the reactivity series, what does that imply?
Answer
(B)
It will react more readily.
25
Which metal from the reactivity series does NOT react with dilute hydrochloric acid?
Answer
(D)
Copper
26
What happens to the copper(II) ions when magnesium is added to a copper(II) sulfate solution?
Answer
(A)
They gain electrons and are reduced.
27
What type of reaction is represented by the 'displacement' reaction?
Answer
(C)
Redox
28
Which metal in the reactivity series reacts with both dilute hydrochloric acid and steam to produce hydrogen gas?
Answer
(B)
Iron
29
In the 'Funnel' experiment, which metal reacts with the acid?
Answer
(B)
Aluminum
30
What is the general trend in the thermal stability of carbonates as you move down Group 2?
Answer
(B)
Increases
31
What does the presence of a layer of aluminum oxide on aluminum do?
Answer
(B)
It makes aluminum less reactive.
32
Which of the following is a typical property of a metal?
Answer
(C)
Good conductors of electricity
33
Which of the following metals does NOT react with dilute hydrochloric acid?
Answer
(D)
Copper
34
Which metal from the provided reactivity series does NOT react with dilute hydrochloric acid?
Answer
(D)
Copper
35
Which of these is a major reason that aluminum doesn't appear to react readily?
Answer
(C)
It forms a protective oxide layer
36
Which metal would NOT react with dilute hydrochloric acid?
Answer
(D)
Gold
37
What is the general name for a reaction where a metal loses electrons?
Answer
(B)
Oxidation
38
Which metal from the reactivity series will displace zinc from a solution of zinc sulfate?
Answer
(C)
Magnesium
39
Which of the following reactions produces a metal and oxygen?
Answer
(C)
Metal Carbonate heated
40
Which metal from the reactivity series will react with both dilute hydrochloric acid and steam?
Answer
(B)
Iron
41
What is the primary reason that alloys are stronger than pure metals?
Answer
(C)
The differing atomic sizes disrupt the regular crystal lattice.
42
What is the primary reason why alloys are stronger than pure metals?
Answer
(B)
The different-sized atoms disrupt the regular arrangement of the atoms, making it harder for layers to slide.
43
Which of the following will react with steam?
Answer
A
C
D
44
Based on the provided reactivity series, which of the following statements is correct?
Answer
(B)
Magnesium reacts more vigorously with water than calcium.
45
What is the correct order of reactivity for the following metals: copper, zinc, and magnesium?
Answer
(D)
Magnesium, zinc, copper
46
What are the possible products formed when a metal is heated with oxygen?
Answer
(A)
Metal oxide only
47
Which substance is a metal?
Answer
(A)
Aluminum
48
What is the primary reason aluminum appears to be unreactive?
Answer
(D)
It forms a protective oxide layer.
49
Which of the following factors influence the reactivity of metals?
Answer
B
C
50
In the reaction of copper(II) oxide with carbon, what is the role of carbon?
