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Byju's Answer
Standard XII
Chemistry
Oxides of Sulphur
Which of the ...
Question
Which of the following is/are soluble in
N
a
O
H
?
A
F
e
(
O
H
)
3
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B
Z
n
(
O
H
)
2
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C
A
l
(
O
H
)
3
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D
S
n
(
O
H
)
2
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Solution
The correct options are
B
Z
n
(
O
H
)
2
C
A
l
(
O
H
)
3
D
S
n
(
O
H
)
2
F
e
(
O
H
)
3
is not soluble in
N
a
O
H
and it gives ppt with
N
a
O
H
as
Suggest Corrections
0
Similar questions
Q.
Which of the following compounds is/are partially soluble or insoluble in
N
H
4
O
H
solution?
(1)
F
e
(
O
H
)
3
(2)
A
g
2
C
r
O
4
(3)
A
l
(
O
H
)
3
(4)
A
g
2
C
O
3
(5)
N
i
(
O
H
)
2
Q.
F
e
(
O
H
)
3
and
A
l
(
O
H
)
3
ppt. can be separated by
N
a
O
H
when
A
l
(
O
H
)
3
becomes soluble due to the formation of
N
a
A
l
O
2
and
F
e
(
O
H
)
3
remains insoluble.
Q.
Fill in the blanks:
(a) Salts of ________ [normal / transition] elements are generally coloured. From the ions K
1
+
, Cr
3
+
, Fe
2
+
, Ca
2
+
, SO
3
2−
, MnO
4
1−
, NO
3
1−
the ions generally coloured are _________ .
(b) The hydroxide which is soluble in excess of NaOH is ________ [Zn(OH)
2
/ Fe(OH)
3
/ Fe(OH)
2
].
(c) The salt which will not react with NH
4
OH solution ________ [ZnCl
2
/ CuCl
2
/ NH
4
Cl / FeCl
2
].
(d) The substance/ s which react/ s with hot conc. NaOH solution and undergoes a neutralization reaction ________ [Al
2
O
3
/ Al / Al(OH)
3
].
(e) To distinguish soluble salts of zinc and lead _________ [NaOH / NH
4
OH] can be used.
Q.
N
a
O
H
can be used to separate
A
l
(
O
H
)
3
and
Z
n
(
O
H
)
2
.
Q.
Assertion :
A
l
(
O
H
)
3
is insoluble in
N
H
4
O
H
but soluble in
N
a
O
H
. Reason:
N
a
O
H
is strong alkali.
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