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Byju's Answer
Standard XII
Chemistry
Orthoboric Acid
4.In the foll...
Question
4.In the following reaction using hydrogen peroxide (H2O2) where O has mass 18(isotopic form)- MnO4- +5 H2O2 (18) +6H+ --->2Mn2+ +8H2O +5O2 O(18) is present in: 1-H2O 2-O2 3-both 4-None
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Q.
In the following reaction,
O
18
is in what?
2
M
n
O
4
−
+
5
H
2
O
18
2
+
6
H
+
→
2
M
n
2
+
+
8
H
2
O
+
5
O
2
Q.
20
g sample of
H
2
O
2
is oxidized by
46.9
mL of
0.145
M
K
M
n
O
4
following the change:
2
M
n
O
−
4
+
5
H
2
O
2
+
6
H
+
⟶
2
M
n
2
+
+
5
O
2
+
8
H
2
O
The mass
%
of
H
2
O
2
in the sample is
:
Q.
A solution of
H
2
O
2
is titrated against a solution of
K
M
n
O
4
.
The reaction is,
2
M
n
O
4
−
+
5
H
2
O
2
+
6
H
+
→
2
M
n
2
+
+
5
O
2
+
8
H
2
O
.
If it requires
46.9
m
L
of
0.145
M
K
M
n
O
4
to oxidise
20
g
of
H
2
O
2
, the mass percentage of
H
2
O
2
in this solution is___________.
Q.
(a)
H
2
O
2
+
O
3
→
H
2
O
+
2
O
2
(b)
H
2
O
2
+
A
g
2
O
→
2
A
g
+
H
2
O
+
O
2
Role of hydrogen peroxide in the above reactions is respectively:
Q.
(
I
)
H
2
O
2
+
O
3
→
H
2
O
+
2
O
2
(
I
I
)
H
2
O
2
+
A
g
2
O
→
2
A
g
+
H
2
O
+
O
2
Role of hydrogen peroxide in the above reactions is respectively
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