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Tardigrade
Question
Chemistry
When iron is rusted, it is
Q. When iron is rusted, it is
86
222
Redox Reactions
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A
Oxidised
B
Reduced
C
Evaporated
D
Decomposed
Solution:
F
e
(
s
)
→
F
e
2
+
+
2
e
−
(Oxidation)
O
2
+
4
H
⊕
+
4
e
−
→
2
H
2
O
(Reduction)
Atmospheric oxidation:
2
F
e
2
+
+
2
H
2
O
+
2
1
O
2
→
F
e
2
O
3
+
4
H
⊕
Rust is
F
e
2
O
3
x
H
2
O
Corrosion or rusting occurs in the presence of water and air