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Standard IX
Chemistry
Ionic Compounds: Chemical Formula
i A + Na2CO...
Question
(i)
A
+
N
a
2
C
O
3
⟶
B
+
C
(ii)
A
C
O
2
−
−
→
(
M
i
l
k
y
)
C
The chemical formula
A
and
B
are respectively.
A
N
a
O
H
and
C
a
(
O
H
)
2
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B
C
a
(
O
H
)
2
and
N
a
O
H
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C
N
a
O
H
and
C
a
O
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D
C
a
O
and
C
a
(
O
H
)
2
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Solution
The correct option is
B
C
a
(
O
H
)
2
and
N
a
O
H
Complete reaction is,
i)
C
a
(
O
H
)
2
+
N
a
2
C
O
3
⟶
N
a
O
H
+
C
a
C
O
3
A
(
B
)
calcium carbonate
(
C
)
ii)
C
a
(
O
H
)
2
+
C
O
2
⟶
C
a
C
O
3
(
C
)
A
(milky)
calcium hydroxide calcium carbonate.
Hence, option
B
is correct.
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0
Similar questions
Q.
The chemical reactions involved in the ammonia soda process are represented as follows:
2
N
a
C
l
+
C
a
C
O
3
→
N
a
2
C
O
3
+
C
a
C
l
2
In the following reactions,
C
a
C
O
3
Δ
−
→
[
A
]
+
[
B
]
N
a
C
l
+
N
H
3
+
[
B
]
+
H
2
O
→
[
C
]
+
[
D
]
2
[
C
]
→
N
a
2
C
O
3
+
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2
O
+
[
B
]
Identify A to D:
Q.
Identify the endothermic and exothermic reaction.
a. HCl + NaOH → NaCl + H
2
O + heat
b.
2
KClO
3
s
→
∆
2
KCl
s
+
3
O
2
↑
c. CaO + H
2
O → Ca(OH)
2
+ heat
d.
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a
CO
3
s
→
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a
O
s
+
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2
↑
Q.
Write chemical names from given formulae.
H
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SO
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2,
HCl, NaOH, KOH, NH
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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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