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Byju's Answer
Standard XII
Chemistry
Introduction
The colour of...
Question
The colour of
S
b
2
S
3
is
:
A
black
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B
yellow
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C
orange
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D
white
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Solution
The correct option is
A
orange
S
b
2
S
3
is orange precipitate.
2
S
b
C
l
3
+
3
H
2
S
+
6
H
2
O
→
S
b
2
S
3
+
6
H
3
O
+
+
6
C
l
−
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0
Similar questions
Q.
Assertion :
S
b
2
S
3
is not soluble in yellow ammonium sulphide. Reason: The common ion effect due to
S
2
−
ions reduce solubility of
S
b
2
S
3
.
Q.
A vessel of
250
litre was filled with
0.01
mole of
S
b
2
S
3
and
0.01
mole of
H
2
to attain the equilibrium at
440
o
C
as :
S
b
2
S
3
(
s
)
+
3
H
2
(
g
)
⇌
2
S
b
(
s
)
+
3
H
2
S
(
g
)
After equilibrium, the
H
2
S
formed was analysed by dissolved it in water and treating with excess of
P
b
2
+
to give
1.19
g of
P
b
S
as precipitate. What is the value of
K
c
at
440
o
C
.
Q.
A vessel of
2.50
l
i
t
r
e
was filled with
0.01
mole of
S
b
2
S
3
adn
0.01
mole of
H
2
to attain the equilibrium at
440
as
S
b
2
S
3
(
s
)
+
3
H
2
(
s
)
⇌
2
S
b
(
s
)
+
3
H
2
S
(
g
)
.
After equilibrium the
H
2
S
formed was analysed by dissolving it in water and treating with excess of
P
b
2
+
to give
1.029
g
of
P
b
S
as precipitate. The value of
K
c
of the reaction at
440
is
X
(At mass of
P
b
=
206
).
100
X
is___________.
Q.
Lines
r
=
a
1
+
t
b
1
and
r
=
a
2
+
s
b
2
lie on a plane if
Q.
Equivalent weight of
F
e
2
S
3
in the reaction is :
(M=molecular weight of
F
e
2
S
3
)
F
e
3
S
3
+
O
2
⟶
F
e
S
O
4
+
S
O
2
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