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KCET 2015 Chemistry Solved Paper
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© examsnet.com
Question : 2
Total: 60
While charging the lead storage battery,________.
P
b
S
O
4
on anode is reduced to Pb
P
b
S
O
4
on cathode is reduced to Pb
P
b
S
O
4
on cathode is oxidized to Pb
P
b
S
O
4
on anode is oxidized to
P
b
O
2
Validate
Solution:
Reaction occurring during charging are:
At anode :
P
b
S
O
4
(
s
)
+
2
e
−
→
P
b
(
s
)
+
S
O
4
2
−
(
a
q
)
At cathode :
P
b
S
O
4
(
s
)
+
2
H
2
O
→
P
b
O
2
(
s
)
+
S
O
4
2
−
(
a
q
)
+
4
H
+
+
2
e
−
––––––––––––––––––––––––––––––––––––––––––––
Net reaction :
2
P
b
S
O
4
+
2
H
2
O
→
P
b
O
2
+
P
b
O
2
+
2
H
2
S
O
4
––––––––––––––––––––––––––––––––––––––––––––
© examsnet.com
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