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Byju's Answer
Standard XII
Chemistry
Uses of Slaked Lime
The reaction ...
Question
The reaction used to prepare
N
a
O
H
from
C
a
(
O
H
)
2
in earlier days is:
N
a
2
C
O
3
+
C
a
(
O
H
)
2
→
2
N
a
O
H
+
C
a
C
O
3
↓
If true enter 1, else enter 0.
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Solution
The reaction used to prepare
N
a
O
H
from
C
a
(
O
H
)
2
in earlier days is:
N
a
2
C
O
3
+
C
a
(
O
H
)
2
→
2
N
a
O
H
+
C
a
C
O
3
↓
It is a true statement.
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Similar questions
Q.
C
a
(
O
H
)
2
+
N
a
2
C
O
3
→
C
a
C
O
3
↓
+
2
N
a
O
H
This reaction made the basis of manufacturing of NaOH in earlier days and pH of the solution was found to be greater than 14. This indicates that concentration of NaOH is very high. Hence, pH is greater than 14.
If true enter 1, else enter 0.
Q.
In the laboratory, where you perform chemistry practical, you would have noticed
N
a
O
H
and
C
a
(
O
H
)
2
containing reagent bottles with a white coating inside. This coating is due to the formation of
N
a
2
C
O
3
and
C
a
C
O
3
.
If true enter 1, else enter 0.
Q.
C
a
(
H
C
O
3
)
2
and
C
a
(
O
H
)
2
cannot be stored in the same vessel.
If true enter 1, else enter 0.
Q.
A process designed to remove organic sulphur from coal prior to combustion involves the reaction.
X
−
S
−
Y
+
2
N
a
O
H
→
X
−
O
−
Y
+
N
a
2
S
+
H
2
O
C
a
C
O
3
→
C
a
O
+
C
O
2
N
a
2
S
+
C
O
2
+
H
2
O
→
N
a
2
C
O
3
+
H
2
S
C
a
O
+
H
2
O
→
C
a
(
O
H
)
2
N
a
2
C
O
3
+
C
a
(
O
H
)
2
→
C
a
C
O
3
+
2
N
a
O
H
In the processing of 320 metric tons of a coal having 1.0% sulphur content, how much limestone
(
C
a
C
O
3
)
must be edecomposed to provide enough
C
a
(
O
H
)
2
to regenerate the NaOH used in the original leaching step?
Q.
Thus A, B, C, D and E are
C
a
C
2
O
4
,
C
O
,
C
O
2
,
C
a
O
and
C
a
(
O
H
)
2
if true enter 1, else enter 0.
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