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Question
Chemistry
The rust of iron is catalysed by which of the following?
Q. The rust of iron is catalysed by which of the following?
2008
244
MGIMS Wardha
MGIMS Wardha 2007
Report Error
A
F
e
B
O
2
C
Z
n
D
H
+
Solution:
Iron is rusted in presence of oxygen and moisture.
m
o
i
s
t
u
re
H
2
O
+
ai
r
C
O
2
H
2
C
O
3
At anode
H
2
C
O
3
2
H
+
+
C
O
3
2
−
F
e
F
e
2
+
+
2
e
−
4
F
e
2
+
+
O
2
+
4
H
2
O
F
e
2
O
3
+
8
H
+
At cathode
H
+
+
e
−
H
4
H
+
O
2
2
H
2
O
Hence, rusting of iron is catalysed by hydrogen ion