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Byju's Answer
Standard XII
Chemistry
Polarisability and Fajan's Rule
If the radius...
Question
If the radius of
F
e
2
+
is
0.76
∘
A
, the radius of
F
e
3
+
is
A
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B
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C
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D
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Solution
The correct option is
C
F
e
3
+
has greater nuclear attraction, size smaller than
F
e
2
+
Suggest Corrections
13
Similar questions
Q.
Element
F
e
has two oxidation states
F
e
2
+
&
F
e
3
+
, the correct order of radii of these ions will be:
Q.
Which of the following statements are correct for the given electrochemical cells?
(I)
F
e
|
F
e
2
+
|
|
F
e
3
+
|
F
e
(II)
F
e
|
F
e
2
+
|
|
F
e
3
+
,
F
e
2
+
|
P
t
(III)
F
e
|
F
e
3
+
|
|
F
e
3
+
,
F
e
2
+
|
P
t
Q.
If
E
⊖
F
e
3
+
|
F
e
and
E
⊖
F
e
2
+
|
F
e
are
−
0.36
V
and
−
0.439
V
, respectively, then the value of
E
⊖
F
e
3
+
|
F
e
2
+
is:
Q.
Calculate the reduction potential at
25
o
C for
F
e
3
+
|
F
e
2
+
electrode, if the concentration of
F
e
2
+
ion is
10
times higher than
F
e
3
+
ion.
[Given
E
0
F
e
3
+
|
F
e
2
+
=
0.77
V
].
Q.
Standard electrode potential of two half-reactions are given below:
F
e
2
+
⇌
F
e
;
E
∘
=
−
0.44
V
F
e
3
+
⇌
F
e
2
+
;
E
∘
=
+
0.77
V
If
F
e
2
+
,
F
e
3
+
and
F
e
are kept together :
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