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Essential Chemistry for IGCSE - Metals And Reactivity (Section 6)

1
Why does aluminum appear unreactive in many situations?
Answer
(B)
It forms a thin layer of aluminum oxide that prevents further reaction.
2
Which property best describes an alloy?
Answer
(B)
Composed of two or more metals.
3
Which substance acts as the reducing agent in the reaction between carbon and copper(II) oxide?
Answer
(A)
Carbon
4
Which of the following is a characteristic property of alloys compared to pure metals?
Answer
(C)
Increased hardness
5
In the reduction of copper(II) oxide using carbon, what is the oxidizing agent?
Answer
(D)
Copper(II) oxide
6
Which metal would not react with dilute hydrochloric acid?
Answer
(D)
Copper
7
In a displacement reaction, what happens to the less reactive metal's ions?
Answer
(B)
They are reduced.
8
Which statement best describes the purpose of a reducing agent?
Answer
(A)
To remove oxygen from a compound.
9
According to the metal reactivity series, which metal is most likely to corrode?
Answer
(D)
Magnesium
10
Which factors affect the reactivity of metals?
Answer
A
B
D
11
Which metal is the most reactive based on the reactivity series shown?
Answer
(A)
Potassium
12
What structural characteristic of alloys contributes most to their increased strength compared to pure metals?
Answer
(B)
The irregular arrangement of atoms due to different atomic sizes.
13
In the reaction of copper(II) oxide with carbon, what substance is being reduced?
Answer
(B)
Copper(II) oxide
14
What occurs when a more reactive metal is added to a solution of the salt of a less reactive metal?
Answer
(C)
The more reactive metal dissolves and displaces the less reactive metal's ions.
15
What happens to the Group 2 carbonates as the temperature increases?
Answer
(A)
They decompose.
16
Which of the following best explains why alloys are generally stronger than their constituent metals?
Answer
(B)
The different sized atoms disrupt the regular arrangement of the atoms.
17
Which metal will react with dilute hydrochloric acid but NOT with steam?
Answer
(B)
Zinc
18
Which of the following is a characteristic of alloys compared to pure metals?
Answer
(B)
Increased hardness
19
Which metal from the reactivity series does not react with dilute hydrochloric acid?
Answer
(D)
Copper
20
What are some characteristics of metals?
Answer
A
C
21
When heating a metal carbonate, what are the general products?
Answer
(B)
Metal oxide and carbon dioxide
22
When most metals react with dilute acids, which gas is produced?
Answer
(B)
Hydrogen
23
Which statements are true regarding alloys?
Answer
A
B
D
24
What are the typical products of the thermal decomposition of a metal carbonate?
Answer
(C)
Metal oxide and carbon dioxide.
25
In the thermal decomposition of a carbonate, which gas is released?
Answer
(C)
Carbon dioxide
26
Which of the following is a property commonly associated with metals?
Answer
A
C
D
27
Which of the following is an example of an alloy?
Answer
(C)
Brass
28
What is observed when a more reactive metal is placed in a solution containing ions of a less reactive metal?
Answer
(B)
The more reactive metal dissolves, and the less reactive metal is displaced.
29
What will happen if you put a piece of copper metal into a solution of zinc sulfate?
Answer
(B)
Nothing will happen because copper is less reactive than zinc.
30
Which of the following products are formed when you heat a metal carbonate?
Answer
(C)
Metal oxide and carbon dioxide
31
Which metal is the least reactive, based on the provided reactivity series?
Answer
(C)
Copper
32
Which of the following statements about aluminum is true?
Answer
(C)
Aluminum forms a protective oxide layer.
33
Which properties are usually associated with metals?
Answer
A
C
34
Which of the following can be classified as an alloy?
Answer
(C)
Steel
35
What happens to the reactivity of Group 2 carbonates as you go down the group?
Answer
(B)
Reactivity increases.
36
In the reaction between copper(II) oxide and carbon, what is the role of the carbon?
Answer
(C)
Reducing agent
37
In a displacement reaction, what happens to the copper ions when a more reactive metal is added?
Answer
(C)
They are reduced.
38
What is the cause of aluminum's apparent lack of reactivity in many situations?
Answer
(B)
The formation of a protective oxide layer.
39
What are the products of a metal reacting with dilute hydrochloric acid?
Answer
(C)
Metal salt and hydrogen
40
Which of the following is true regarding metal reactivity?
Answer
(C)
The higher the metal in the reactivity series, the more it will corrode.
41
What is a common product when heating a metal hydroxide?
Answer
(B)
Metal oxide and water
42
Which of the following metals reacts with both dilute hydrochloric acid and steam?
Answer
(B)
Iron
43
What type of reaction happens when you heat a metal carbonate?
Answer
(B)
Decomposition