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Tardigrade
Question
Chemistry
Equivalent mass of K2Cr2O7 in acidic solution is equal to
Q. Equivalent mass of
K
2
C
r
2
O
7
in acidic solution is equal to
1812
196
COMEDK
COMEDK 2010
The d-and f-Block Elements
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A
molecular mass/2
13%
B
molecular mass/4
12%
C
molecular mass
9%
D
molecular mass/6
66%
Solution:
C
+6
r
2
O
7
2
−
+
14
H
+
+
6
e
−
→
2
C
r
3
+
+
7
H
2
O
Total number of electrons gained = 6
Total change in oxidation number of Cr
=
2
(
+
6
)
−
2
(
+
3
)
=
6
Eq.mass of
K
2
C
r
2
O
7
=
6
M
o
l
.
ma
ss
o
f
K
2
C
r
2
O
7