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Byju's Answer
Standard VII
Chemistry
Salts
NaOH A + HClB...
Question
N
a
O
H
(
A
)
+
H
C
l
(
B
)
→
N
a
C
l
+
H
2
O
Identify the nature of reactant A and B?
A
Acid(A) and Acid(B)
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B
Acid(A) and Base(B)
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C
Base(A) and Acid(B)
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D
Base(A) and Base(B)
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Solution
The correct option is
C
Base(A) and Acid(B)
(A) is a base called sodium hydroxide.
(B) is an acid called hydrochloric acid.
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Similar questions
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.
Identify the endothermic and exothermic reaction.
a.
H
C
l
+
N
a
O
H
→
N
a
C
l
+
H
2
O
+
h
e
a
t
b.
2
K
C
l
O
3
(
s
)
Δ
−
→
2
K
C
l
(
s
)
+
3
O
2
↑
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.
C
a
CO
3
s
→
∆
C
a
O
s
+
CO
2
↑
Q.
Out of KCl, HCl, CCl
4
and NaCl, the compounds which are not ionic are:
(a) KCl and HCl
(b) HCl and CCl
4
(c) CCl
4
and NaCl
(d) KCl and CCl
4
Q.
Which choice or choices demonstrate amphoterism?
i.
H
C
l
+
H
2
O
→
H
3
O
+
+
C
l
−
and
H
2
O
+
N
3
→
O
H
−
+
N
H
−
4
ii.
H
S
−
+
H
C
l
→
C
l
−
+
H
2
S
and
H
S
−
+
N
H
3
→
N
H
+
4
+
S
2
−
iii.
H
C
l
+
N
a
O
H
→
N
a
C
l
+
H
2
O
and
N
a
C
l
+
H
2
O
→
H
C
l
+
N
a
O
H
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