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Byju's Answer
Standard VIII
Chemistry
Chemical Formulae
Identify A,...
Question
Identify
(
A
)
,
(
B
)
,
(
C
)
and
(
D
)
and give their chemical formulae.
(
A
)
+
N
a
O
H
H
e
a
t
−
−−
→
N
a
C
l
+
N
H
3
+
H
2
O
N
H
3
+
C
O
2
+
H
2
O
→
(
B
)
(
B
)
+
N
a
C
l
→
(
C
)
+
N
H
4
C
l
(
C
)
→
N
a
2
C
O
3
+
H
2
O
+
(
D
)
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Solution
(
A
)
N
H
4
C
l
, ammonium chloride;
(
B
)
N
H
4
H
C
O
3
, ammonium bicarbonate;
(
C
)
N
a
H
C
O
3
, sodium bicarbonate;
(
D
)
C
O
2
, carbon dioxide.
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Similar questions
Q.
Complete and balance the following chemical equations:
(a)
NaCl
(
aq
)
+
H
2
O
(
l
)
→
Electricity
(b)
NaHCO
3
→
Heat
(c)
NaCl
+
NH
3
+
H
2
O
+
CO
2
→
(d)
Ca
(
OH
)
2
+
Cl
2
→
Q.
Identify
(
A
)
,
(
B
)
,
(
C
)
&
(
D
)
and give their chemical formulae:
(i)
(
A
)
+
N
a
O
H
H
e
a
t
⟶
N
a
C
l
+
N
H
3
+
H
2
O
(ii)
N
H
3
+
C
O
2
+
H
2
O
⟶
(
B
)
(iii)
(
B
)
+
N
a
C
l
⟶
(
C
)
+
N
H
4
C
l
(iv)
(
C
)
H
e
a
t
⟶
N
a
2
C
O
3
+
H
2
O
+
(
D
)
Q.
In the above reaction if
A
is
N
H
4
C
l
and
D
is
C
O
2
then
B
&
C
respectively are :
(A)
+
N
a
O
H
→
N
a
C
l
+
N
H
3
+
H
2
O
N
H
3
+
C
O
2
+
H
2
O
→
(
B
)
(B)
+
N
a
C
l
→
(
C
)
+
N
H
4
C
l
(C)
→
N
a
2
C
O
3
+
H
2
O
+
(
D
)
Q.
Complete and balance the following chemical equations:
(a)
NaCl
(
aq
)
+
H
2
O
(
l
)
→
Electricity
(b)
NaHCO
3
→
Heat
(c)
NaCl
+
NH
3
+
H
2
O
+
CO
2
→
(d)
Ca
(
OH
)
2
+
Cl
2
→
Q.
Consider the following chemical reactions.
निम्नलिखित रासायनिक अभिक्रियाओं पर विचार कीजिए।
NaCl + H
2
O + CO
2
+ NH
3
→ NH
4
Cl + A
A + HCl → NaCl + B + C↑
2
A
Heat
−
−
→
D + B + C
↑
Now, identify A, B, C and D and choose the correct option.
अब A, B, C तथा D को पहचानिये तथा सही विकल्प का चयन कीजिए।
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