Africa Exams
Where Preparation Meets Success
Home
Botswana
Botswana PSLE Papers
Botswana JCE Papers
Botswana BGCSE Papers
Ghana
Ghana BECE Exams
Kenya
Kenya KCPE Papers
Kenya KCSE Papers
Kenya KASNEB Papers
Nigeria
WAEC Exams
JAMB Exams
Rwanda
Rwanda Primary Papers
Rwanda Secondary Papers
Uganda
Uganda PLE Papers
Uganda UCE Papers
Uganda UACE Papers
Certifications
Technical
Cloud Tech Certifications
Security Tech Certifications
Management
IT Infrastructure
More
About
Contact Us
Our Apps
Privacy
+
-
Test Index
JAMB Chemistry 2024 Paper
Show Para
Hide Para
Share question:
© africaexams.com
Question : 56
Total: 138
Rust on the surface of a metal sheet contains
hydrated iron(II)oxide
hydrated iron(III)oxide
iron(III)hydroxide
iron(III) trioxocarbonate(IV)
Validate
Solution:
Rust on a metal sheet contains iron oxide, which is a compound made of iron, oxygen, and hydrogen:
Chemical formula
: The chemical formula for rust is
Fe
2
O
3
.x H
2
O
also known as hydrated Iron(III) oxide.
The chemical equation for the rusting of iron is
4Fe + 3O
2
+ xH
2
O → 2Fe
2
O
3
⋅xH
2
O
© africaexams.com
Go to Question:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
Prev Question
Next Question
