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Byju's Answer
Standard XII
Chemistry
Buffer Solutions
Which pair ca...
Question
Which pair can not act as buffer?
A
C
H
3
C
O
O
H
+
C
H
3
C
O
O
N
a
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B
Borax +
H
3
B
O
3
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C
H
C
l
+
N
H
4
O
H
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D
N
H
4
C
l
+
H
C
l
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Solution
The correct option is
D
N
H
4
C
l
+
H
C
l
N
H
4
C
l
and
H
C
l
can not behave as buffer
N
H
4
C
l
is formed from the reaction of
N
H
3
, a weak base, and
H
C
l
, a strong acid.
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Similar questions
Q.
a) Calculate heat of dissociation for Acetic acid from the following data:
C
H
3
C
O
O
H
+
N
a
O
H
⟶
C
H
3
C
O
O
N
a
+
H
2
O
.
.
.
.
Δ
H
=
−
13.2
K
c
a
l
H
⊕
+
⊖
O
H
⟶
H
2
O
;
.
.
.
.
Δ
H
=
−
13.7
K
c
a
l
.
b) calculate heat of dissociation for
N
H
4
O
H
if
H
C
l
+
N
H
4
O
H
⟶
N
H
4
C
l
+
H
2
O
;
Δ
H
=
−
12.27
K
c
a
l
.
Q.
How many of the following are strong electrolytes?
a.
N
H
3
b.
N
H
4
C
l
c.
C
H
3
C
O
O
H
d.
C
H
3
C
O
O
N
a
e.
H
C
l
f.
N
a
C
l
Q.
Assertion :The
p
H
of
N
H
4
C
l
solution in water is less than
7
and pH of
C
H
3
C
C
O
O
N
a
solution is more than
7
. Reason:
N
H
4
C
l
is a salt of weak base
N
H
4
O
H
and strong acid
H
C
l
whereas
C
H
3
C
O
O
N
a
is a salt of a weak acid
C
H
3
C
O
O
H
and strong base
N
a
O
H
.
Q.
________ number reagents listed below could be added to water to make 0.1 M solution of
C
l
−
ion?
i.
N
H
3
ii.
N
H
4
C
l
iii.
C
H
3
C
O
O
H
iv.
C
H
3
C
O
O
N
a
v.
H
C
l
vi.
N
a
C
l
Q.
The molar conductivities of
H
C
l
,
N
a
C
l
,
C
H
3
C
O
O
H
a
n
d
C
H
3
C
O
O
N
a
at infinite dilution follow the order
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