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Standard XII
Chemistry
Analgesics
Q. 10g of Mno...
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Q. 10g of Mno2 on reaction with HCL forms 2.24 L of Cl2(g) at NTP. The percentage purity of Mno2 is ? MnO2 + HCl → MnCl2 + Cl2 + H2O
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Q.
How many grams of HCl is needed for complete reaction with
69.6
g
M
n
O
2
?
H
C
l
+
M
n
O
2
→
M
n
C
l
2
+
H
2
O
+
C
l
2
Q.
10
g
of
M
n
O
2
on reaction with HCI forms
2.24
L
of
C
I
2
(
g
)
at NTP, the percentage impurity of
M
n
O
2
is:
M
n
O
2
+
4
H
C
I
→
M
n
C
I
2
+
C
I
2
+
2
H
2
O
Q.
10
g of
M
n
O
2
on reaction with conc.
H
C
l
liberated
0.1
equivalent of
C
l
2
(molecular weight of
M
n
=
55
g/mol). Hence, percentage purity of
M
n
O
2
is
:
Q.
Assertion :One equivalent of
M
n
O
2
reacts with 2 equivalents of
H
C
l
in the reaction,
M
n
O
2
+
4
H
C
l
⟶
M
n
C
l
2
+
2
H
2
O
+
C
l
2
. Reason: One equivalent of
M
n
O
2
reacts with one equivalent of
H
C
l
.
Q.
M
n
O
2
+
4
H
C
l
⟶
M
n
C
l
2
+
2
H
2
O
+
C
l
2
2
moles
M
n
O
2
reacts with
4
moles of
H
C
l
to form
11.2
L
C
l
2
at STP. Thus, percent yield of
C
l
2
is
:
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