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Byju's Answer
Standard XII
Chemistry
Phosphine
Manganese sal...
Question
Manganese salt
+
P
b
O
2
+
conc.
H
N
O
3
→
the solution acquires purple colour. The colour is due to:
A
M
n
(
N
O
3
)
2
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B
P
b
(
N
O
3
)
2
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C
H
M
n
O
4
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D
M
n
O
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Solution
The correct option is
D
H
M
n
O
4
Manganese salt is
M
n
(
N
O
3
)
2
2
M
n
(
N
O
3
)
2
+
5
P
b
O
2
+
6
H
N
O
3
Δ
→
2
H
M
n
O
4
+
5
P
b
(
N
O
3
)
2
+
2
H
2
O
Permanganic acid (
H
M
n
O
4
) gives the colour.
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0
Similar questions
Q.
Balance the following equation.
M
n
O
+
P
b
O
2
+
H
N
O
3
→
H
M
n
O
4
+
P
b
(
N
O
3
)
2
+
H
2
O
Q.
M
a
n
g
a
n
e
s
e
s
a
l
t
+
P
b
O
2
+
c
o
n
c
.
H
N
O
3
⟶
The solution has purple color. The color is due to
:
Q.
Assertion :
K
M
n
O
4
is purple in colour due to charge transfer. Reason: There is no electron present in
d
−
orbitals of manganese in
M
n
O
−
4
.
Q.
Mn
+2
+PbO
2
+conc. HNO
3
----------->pink colour
Pink colour is due to
A)HMnO
4
B)PB(NO
3
)
2
C)Mn(NO
3
)
2
D)H2MnO4
Q.
A scarlet compound (A) is treated with conc.
H
N
O
3
to give a choclate brown precipitate (B). The precipitate is filtered and the filtrate is neutralised with
N
a
O
H
. Addition to KI to the resulting solution gives a yellow precipitate (C). The precipitate (B) on warming with conc.
H
N
O
3
in the presence of
M
n
(
N
O
3
)
2
produces a pink-coloured solution due to the formation of (D). Compounds (A), (B), (C) and (D) are identified as
P
b
3
O
4
,
P
b
O
2
,
P
B
l
2
and
H
M
n
O
4
(pink)
If the given statement is true enter 1 else enter 0.
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