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Byju's Answer
Standard XII
Chemistry
Secondary Cells
Why does the ...
Question
Why does the cell potential of mercury cell remain constant throughout its life ?
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Solution
As the overall reaction does not involve any ion in the solution whose concentration changes during its life period.
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Similar questions
Q.
Why the cell potential of mercury cell remains constant during its life.
Q.
Unlike dry cells, the mercury cell has a constant cell potential throughout its useful life. Why?
Q.
(a) Following reactions occur at cathode during the electrolysis of aqueous sodium chloride solution:
N
a
+
(
a
q
)
+
e
−
⟶
N
a
(
s
)
E
0
=
−
2.71
V
H
+
(
a
q
)
+
e
−
⟶
1
2
H
2
(
g
)
E
0
=
0.00
V
On the basis of their standard reduction electrode potential
(
E
0
)
values, which reaction is feasible at the cathode and why?
(b) Why does the cell potential of mercury cell remain constant throughout its life?
Q.
Assertion :The voltage of mercury cell remains constant for its life time. Reason: Overall cell reaction does not involve any ion.
Q.
Assertion :In mercury cell, the cell potential is approximately
1.35
V and remains constant during its life. Reason: The overall reaction in mercury cell is represented as
Z
n
(
H
g
)
+
H
g
O
(
s
)
→
Z
n
O
(
s
)
+
H
g
(
l
)
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