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Byju's Answer
Standard XII
Chemistry
Preparations and Uses of Sodium Bicarbonate and Common Salt
Crude common ...
Question
Crude common salt is hygroscopic because of impurities of:
A
C
a
S
O
4
and
M
g
S
O
4
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B
C
a
C
l
2
and
M
g
C
l
2
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C
C
a
B
r
2
and
M
g
B
r
2
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D
C
a
(
H
C
O
3
)
2
and
M
g
(
H
C
O
3
)
2
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Solution
The correct option is
C
C
a
C
l
2
and
M
g
C
l
2
Crude common salt contains impurities such as
C
a
S
O
4
,
C
a
C
l
2
,
M
g
C
l
2
. Hence it is deliquescent (hygroscopic).
Hence option B is correct.
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Similar questions
Q.
Different samples of water contained each
100
ppm of
C
a
C
l
2
,
M
g
S
O
4
,
C
a
S
O
4
and
M
g
C
l
2
. Among them which will have greater hardness?
Q.
Assertion :Statement -I:
N
a
C
l
when exposed in air it becomes wet.
Reason: Statement -II:
N
a
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l
contains hygroscopic impurities like
C
a
C
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2
,
M
g
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l
2
etc.
Q.
Different water samples A, B, C and D have 150 ppm each of
C
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C
l
2
,
M
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S
O
4
,
C
a
S
O
4
a
n
d
M
g
C
l
2
respectively. The order of degree of hardness of these samples is
Q.
A water sample contains 81 ppm of
C
a
(
H
C
O
3
)
2
, 73 ppm of
M
g
(
H
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O
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a
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and 60 ppm of
M
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S
O
4
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Q.
Molten mixture of
N
a
C
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and
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a
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M
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C
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