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p-Block Elements: Groups 13 and 14
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Aluminium compounds and alums
NEET level
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Difficulty 1 of 3
pb010
Potash alum has the formula
K
X
2
SO
X
4
⋅
Al
X
2
(
SO
X
4
)
X
3
⋅
x
H
X
2
O
. The value of
x
is
A
12
B
18
C
6
D
24
Answer: D
Potash alum is
K
X
2
SO
X
4
⋅
Al
X
2
(
SO
X
4
)
X
3
⋅
24
H
X
2
O
, equivalently
KAl
(
SO
X
4
)
X
2
⋅
12
H
X
2
O
. Hence
x
=
24
.
Practice p-Block Elements: Groups 13 and 14
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