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Byju's Answer
Standard XII
Chemistry
EMF
The E 0 in ...
Question
The
E
0
in the given diagram is :-
A
0.5
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B
0.6
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C
0.7
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D
0.8
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Solution
The correct option is
B
0.6
We have,
n
F
E
0
c
e
l
l
=
n
F
E
0
1
+
n
F
E
0
2
where n = change in number of electron
6
E
0
=
4
∗
0.54
+
0.71
∗
2
E
0
=
0.59
Suggest Corrections
0
Similar questions
Q.
A radiation of energy
E
(
E
>
E
0
)
falls on a metal whose threshold frequency is
E
0
. The Kinetic energy of the emitted electrons is given by:
Q.
Which is the correct increasing order of reducing power of the given metals?
Standard electrode potentials:
K
+
+
e
−
→
K
;
E
0
=
−
2.93
V
A
g
+
+
e
−
→
A
g
;
E
0
=
0.80
V
H
g
2
+
2
+
e
−
→
2
H
g
;
E
0
=
0.79
V
M
g
2
+
+
e
−
→
M
g
;
E
0
=
−
2.37
V
C
r
3
+
+
e
−
→
C
r
;
E
0
=
−
0.74
V
Q.
Given below are the half -cell
M
n
2
+
+
2
e
−
→
M
n
;
E
0
=
−
1.18
V
2
(
M
n
3
+
+
e
−
→
M
n
2
+
)
;
E
0
=
+
1.51
V
The
E
0
for
3
M
n
2
+
→
M
n
+
2
M
n
3
+
will be:
Q.
Which of the following metal cannot be oxidized by
N
O
−
3
in aqueous solution?
For the reduction of
N
O
−
3
ion in an aqueous solution,
E
0
is
+
0.96
V
.
E
0
for metal ions are given below.
V
2
+
(
a
q
)
+
2
e
−
→
V
(
s
)
;
E
0
=
−
1.19
V
F
e
3
+
(
a
q
)
+
3
e
−
→
F
e
(
s
)
;
E
0
=
−
0.04
V
A
u
3
+
(
a
q
)
+
3
e
−
→
A
u
(
s
)
;
E
0
=
+
1.40
V
H
g
2
+
(
a
q
)
+
2
e
−
→
H
g
(
s
)
;
E
0
=
+
0.86
V
Q.
The values of
E
0
of some of the reactions are given below:
I
2
(
g
)
+
2
e
−
→
2
I
−
(
a
q
)
;
E
0
=
+
0.54
V
C
l
2
(
g
)
+
2
e
−
→
2
C
l
−
(
a
q
)
;
E
0
=
+
1.36
V
F
e
3
+
(
a
q
)
+
e
−
→
F
e
2
+
(
a
q
)
;
E
0
=
+
0.76
V
C
e
4
+
(
a
q
)
+
e
−
→
C
e
3
+
(
a
q
)
;
E
0
=
+
1.60
V
S
n
4
+
(
a
q
)
+
2
e
−
→
S
n
2
+
(
a
q
)
;
E
0
=
+
0.15
V
Which of the following statement is/are true?
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