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Essential Chemistry for IGCSE - Metals And Reactivity (Section 1)

1
Which of the following statements are true regarding the reactions of metals with acids?
Answer
B
C
2
Which of the following is true about the reactivity series?
Answer
A
B
D
3
What property of metals makes them suitable for electrical wiring?
Answer
(C)
Good conductivity of electricity
4
Which of the following statements is true regarding reactivity and the electrochemical series?
Answer
(A)
Metals high in the series are more reactive.
5
What happens to aluminium in the 'thermite' reaction?
Answer
(B)
It is oxidized.
6
What are the products formed when copper(II) oxide is reduced with carbon?
Answer
(A)
Copper and carbon dioxide
7
What is the purpose of adding other metals when making alloys?
Answer
(B)
To improve the strength and other properties.
8
Which of the following metals does NOT react with dilute hydrochloric acid?
Answer
(C)
Copper
9
Which factors influence the thermal stability of metal carbonates?
Answer
A
C
10
When heated, what are the usual products from copper(II) carbonate decomposition?
Answer
(B)
Copper oxide and carbon dioxide.
11
What makes metals reactive?
Answer
(B)
Their ability to easily lose electrons.
12
What type of reaction is the thermal decomposition of calcium carbonate?
Answer
(B)
Decomposition
13
Which of the following metals can be extracted from its oxide by heating with carbon?
Answer
(C)
Iron
14
What is the defining characteristic of a displacement reaction?
Answer
(A)
One element replaces another in a compound.
15
During metal extraction using carbon, what is the function of carbon?
Answer
(B)
Reduce the metal oxide.
16
Which property of an alloy makes it more resistant to wear and tear compared to a pure metal?
Answer
(B)
Irregular atomic structure
17
What is the main reason for aluminium seeming unreactive?
Answer
(B)
It forms a strong oxide layer on its surface.
18
Which of the following conditions must be present for iron to rust?
Answer
(D)
Water and oxygen
19
During metal extraction using carbon, what is carbon's role?
Answer
(B)
Reducing agent
20
What gas is commonly released when a metal reacts with dilute hydrochloric acid?
Answer
(C)
Hydrogen
21
What is the main reason metals are considered reactive?
Answer
(B)
Their ability to lose electrons.
22
What are the key components that lead to the rusting of iron?
Answer
(D)
Iron and oxygen.
23
Which of the following is a requirement for iron to rust?
Answer
(C)
Water and oxygen
24
Which of the following statements describe thermal decomposition?
Answer
A
C
25
What type of reaction occurs when a more reactive metal displaces a less reactive metal from its compound?
Answer
(C)
Displacement
26
In the thermite reaction, what is the function of aluminium?
Answer
(B)
Reducing agent
27
Which layer protects the aluminium from further corrosion?
Answer
(B)
A layer of aluminum oxide (Al2O3)
28
What is the main reason for the high reactivity of metals?
Answer
(A)
Their ability to form positive ions by losing electrons.
29
Which statements correctly characterize a redox reaction?
Answer
A
B
30
What happens when you heat a metal carbonate?
Answer
(B)
It forms a metal oxide and carbon dioxide.
31
What is the primary benefit of making alloys?
Answer
(C)
To improve the metal's properties.
32
Why does aluminium not corrode easily, despite being a very reactive metal?
Answer
(B)
Because a layer of aluminium oxide (Al2O3) protects it.
33
What is a common use of carbon in metal extraction?
Answer
(B)
To act as a reducing agent
34
What is the result when copper(II) carbonate is heated?
Answer
(B)
Copper oxide and carbon dioxide
35
What is a reducing agent?
Answer
(A)
A substance that loses electrons.
36
What conditions are essential for iron to rust?
Answer
(D)
Iron and oxygen
37
In the 'thermite' reaction, which substance acts as a reducing agent?
Answer
(A)
Aluminium
38
In a displacement reaction, what does the more reactive metal do?
Answer
(C)
It replaces a less reactive metal.
39
Which of the following is an example of thermal decomposition?
Answer
(C)
The heating of copper(II) carbonate
40
Which of the following is the most reactive metal in the reactivity series shown?
Answer
(C)
Sodium
41
In the thermite reaction, what chemical species is the reducing agent?
Answer
(B)
Aluminium
42
When iron rusts, which substance is involved in the oxidation process?
Answer
(B)
Oxygen
43
What gas is usually produced when a metal reacts with dilute acid?
Answer
(C)
Hydrogen
44
Which of the following will react most vigorously with dilute hydrochloric acid?
Answer
(C)
Zinc
45
What typically happens to a metal carbonate when it's heated?
Answer
(B)
Forms oxide & CO2
46
Which of the following statements is/are true about thermal decomposition reactions?
Answer
B
C
47
What does thermal decomposition involve?
Answer
(A)
Breaking down a substance by heating.
48
What defines a displacement reaction?
Answer
(B)
One element replacing another in a compound.
49
Which of the following statements best describes an alloy?
Answer
(C)
A mixture of two or more metals, or a metal with a nonmetal.
50
What general pattern is observed in the thermal decomposition of Group 2 carbonates?
Answer
A
D