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Essential Chemistry for IGCSE - Metals And Reactivity (Section 5)

1
What is a common use of alloys?
Answer
(D)
All of the above
2
Which of the following metals will react with cold water?
Answer
(B)
Sodium
3
What is the function of carbon when it reacts with copper(II) oxide?
Answer
(D)
It removes oxygen from the copper(II) oxide.
4
What is the key difference in the arrangement of atoms in an alloy compared to a pure metal?
Answer
(C)
Alloys use different-sized atoms, disrupting the regular structure.
5
In which case, does the metal react when exposed to heat?
Answer
(C)
Metal Carbonate heated
6
What is the main driving force behind the 'displacement' reaction?
Answer
(C)
The difference in reactivity.
7
Which of the following metals will react with dilute hydrochloric acid?
Answer
(C)
Iron
8
What are the products of the thermal decomposition of calcium carbonate?
Answer
(B)
Calcium oxide and carbon dioxide
9
Which metal(s) in the reactivity series will react with steam to produce hydrogen gas?
Answer
(C)
Iron
10
If a metal is easily corroded, what can be said about its position in the reactivity series?
Answer
(A)
It is high in the reactivity series.
11
Which statement best describes the purpose of the oxide layer on Aluminum?
Answer
(C)
It prevents further corrosion
12
What is the usual result of a metal carbonate being heated?
Answer
(D)
A metal oxide and carbon dioxide are produced.
13
Based on the provided metal reactivity series, which metal is considered the LEAST reactive?
Answer
(D)
Gold
14
Which of the following metals will react with both dilute acid and steam?
Answer
(B)
Iron
15
In the reaction between magnesium and copper(II) sulfate, what happens to the copper ions?
Answer
(B)
They are reduced.
16
What is formed when a metal carbonate is heated?
Answer
(B)
A metal oxide and carbon dioxide
17
Based on the metal reactivity series, which metal will react most vigorously with steam?
Answer
(A)
Sodium
18
Which term describes the process where copper gains electrons in a reaction?
Answer
(B)
Reduction
19
What are some typical physical properties of metals?
Answer
A
C
20
What is the role of carbon in reducing copper(II) oxide?
Answer
(B)
It removes the oxygen from the copper(II) oxide.
21
Which metal from the reactivity series is the least reactive?
Answer
(C)
Gold
22
What is a typical property of a metal?
Answer
A
C
23
What is observed when magnesium is added to copper(II) sulfate solution?
Answer
(B)
The magnesium dissolves and copper is deposited.
24
Which products are usually formed when a metal carbonate is heated?
Answer
(A)
Metal oxide and carbon dioxide.
25
Which of the following are true concerning the relative reactivity of metals?
Answer
A
B
26
What will happen in a displacement reaction?
Answer
(A)
The less reactive metal is displaced by the more reactive one.
27
Which of the following is true about alloys?
Answer
(B)
They are mixtures of metals.
28
What type of gas is formed when most metals react with dilute acid?
Answer
(B)
Hydrogen
29
Which statement describes the best about the action of adding magnesium to copper (II) sulfate?
Answer
(C)
Magnesium displaces the copper ions from the solution.
30
What is an alloy composed of?
Answer
(C)
A mixture of metals, and sometimes non-metals.
31
How does the protective layer of aluminum oxide on aluminum affect its reactivity?
Answer
(C)
It prevents further reaction, thus decreasing reactivity.
32
What does the term 'reducing agent' mean?
Answer
(A)
A substance that loses electrons.
33
What is the difference between alloys and pure metals?
Answer
(A)
Alloys are mixtures.
34
In a displacement reaction, which species undergoes reduction?
Answer
(B)
The less reactive metal's ions.
35
Which metals will not react with dilute hydrochloric acid?
Answer
B
D
36
What is the key factor in determining the strength and hardness of an alloy?
Answer
(B)
The different sized atoms disrupting the metal structure.
37
Which of the following statements about alloys is true?
Answer
(C)
They are mixtures of metals.
38
When a more reactive metal is added to a solution of a less reactive metal's salt, what happens?
Answer
(B)
The more reactive metal displaces the less reactive metal.
39
What is the primary structural reason alloys are often harder and stronger than their constituent metals?
Answer
(C)
The different-sized atoms disrupt the regular atomic packing.
40
In the reaction between a metal and hydrochloric acid, what gas is typically released?
Answer
(B)
Hydrogen
41
What is a reducing agent?
Answer
(B)
A substance that loses electrons.
42
What are some typical properties of metals?
Answer
A
C
D
43
In a displacement reaction, which of the following will occur?
Answer
(A)
The more reactive metal will displace the ions of the less reactive metal.
44
According to the reactivity series, which metal is the least reactive?
Answer
(C)
Copper
45
Which metal(s) from the reactivity series will react with steam to produce hydrogen gas?
Answer
(B)
Zinc and Iron
46
Which of the following is a property of alloys?
Answer
(C)
They are often harder than the metals they are made from.
47
Which gas is released during the thermal decomposition of metal nitrates?
Answer
(B)
Hydrogen
48
What is oxidation defined as?
Answer
(B)
The loss of electrons
49
What is the primary reason why aluminum appears unreactive despite being a reactive metal?
Answer
(B)
It forms a protective oxide layer on its surface.
50
Which of the following is the most reactive element in the provided reactivity series
Answer
(D)
Potassium