1
You visited us
1
times! Enjoying our articles?
Unlock Full Access!
Byju's Answer
Standard XII
Chemistry
EMF
The standard ...
Question
The standard electrode potential of the half cells are given below -
Z
n
2
+
+
2
e
−
→
Z
n
;
E
1
=
−
7.62
V
F
e
2
+
+
2
e
−
→
F
e
;
E
2
=
−
7.81
V
The emf of the cell,
F
e
2
+
+
Z
n
→
Z
n
2
+
+
F
e
is:
A
1.52
V
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
−
1.54
V
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
−
0.19
V
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
0.19
V
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution
The correct option is
A
−
0.19
V
Z
n
2
+
+
2
e
−
→
n
;
E
1
=
−
7.62
V
−
−
−
−
−
−
−
E
1
F
e
2
+
+
2
e
−
→
F
e
;
E
2
=
−
7.81
V
−
−
−
−
−
−
−
E
2
On subtracting the
E
2
from
E
1
, we get -
F
e
2
+
+
Z
n
→
F
e
+
Z
n
2
+
E
=
E
F
e
2
+
/
F
e
−
E
Z
n
2
+
/
Z
n
E
=
E
2
−
E
1
E
=
−
7.81
−
(
−
7.62
)
⇒
E
=
−
0.19
V
Hence, option
(
C
)
is correct.
Suggest Corrections
0
Similar questions
Q.
The standard electrode potential of the half cells is given below:
Z
n
2
+
+
2
e
−
→
Z
n
;
E
=
−
0.76
V
F
e
2
+
+
2
e
−
→
F
e
;
E
=
−
0.44
V
The emf of the cell
F
e
2
+
=
Z
n
−
→
Z
n
2
+
+
F
e
Q.
The standard reduction potential
E
o
for half reactions are,
Z
n
→
Z
n
2
+
+
2
e
−
;
E
o
=
−
0.76
V
F
e
2
+
+
2
e
−
→
F
e
;
E
o
=
+
0.41
V
The emf of the cell reaction;
F
e
2
+
+
Z
n
→
Z
n
2
+
+
F
e
is:
Q.
The standard reduction potential
E
o
for the half reactions are as
Z
n
⟶
Z
n
2
+
+
2
e
−
;
E
o
=
+
0.76
V
F
e
⟶
F
e
2
+
+
2
e
−
;
E
o
=
+
0.41
V
The emf for cell reaction,
F
e
2
+
+
Z
n
⟶
Z
n
2
+
+
F
e
, is
Q.
Reduction potential for the following half/cell reaction are
Z
n
→
Z
n
2
+
+
2
e
−
(
E
0
(
Z
n
2
+
/
Z
n
)
=
−
0.76
V
)
F
e
→
F
e
2
+
+
2
e
−
E
0
=
0.41
V
The EMF for the cell reaction
F
e
2
+
+
Z
n
→
Z
n
2
+
+
F
e
will
Q.
The standard oxidation potentials,
E
∘
, for the half reactions are as,
Z
n
→
Z
n
2
+
+
2
e
−
;
E
∘
=
+
0.76
v
o
l
t
F
e
→
F
e
2
+
+
2
e
−
;
E
∘
=
+
0.41
v
o
l
t
The emf of the cell,
F
e
2
+
+
Z
n
→
Z
n
2
+
+
F
e
is:
View More
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
Related Videos
Electrode Potential and emf
CHEMISTRY
Watch in App
Explore more
EMF
Standard XII Chemistry
Join BYJU'S Learning Program
Grade/Exam
1st Grade
2nd Grade
3rd Grade
4th Grade
5th Grade
6th grade
7th grade
8th Grade
9th Grade
10th Grade
11th Grade
12th Grade
Submit
AI Tutor
Textbooks
Question Papers
Install app