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Standard XII
Chemistry
Question
What are the units of equilibrium constant (
k
c
) for the following reaction?
C
(
s
)
+
O
2
(
g
)
⇌
C
O
2
(
g
)
mol/lit
(
m
o
l
/
l
i
t
)
−
1
l
i
t
2
m
o
l
−
2
k
c
has no units
A
mol/lit
B
l
i
t
2
m
o
l
−
2
C
k
c
has no units
D
(
m
o
l
/
l
i
t
)
−
1
Open in App
Solution
Verified by Toppr
For the reaction:
C
(
s
)
+
O
2
(
g
)
⇌
C
O
2
(
g
)
K
C
=
[
C
O
2
]
[
C
]
[
O
2
]
,
[
C
]
=
1
because carbon is solid
k
c
=
[
C
O
2
]
[
O
2
]
[
C
O
2
]
=
Molarity of
C
O
2
[
O
2
]
=
Molarity of
O
2
∴
Both
[
C
O
2
]
&
[
O
2
]
must
have same unit i.e. mol/lit.
Hence,
K
c will be unitless.
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3
Similar Questions
Q1
What are the units of equilibrium constant (
k
c
) for the following reaction?
C
(
s
)
+
O
2
(
g
)
⇌
C
O
2
(
g
)
View Solution
Q2
Write the unit of equilibrium constant
(
K
c
)
for the given reaction.
C
(
s
)
+
1
2
O
2
(
g
)
→
C
O
2
(
g
)
View Solution
Q3
Write the unit of equilibrium constant
(
K
c
)
for the given reaction.
C
(
s
)
+
1
2
O
2
(
g
)
→
C
O
2
(
g
)
View Solution
Q4
For the equilibrium
A
(
g
)
⇌
B
(
g
)
+
C
(
g
)
;
K
p
=
0.82
atm at
27
o
C. At the same temperature, its
K
c
in mol
l
i
t
−
1
is:
[
R
=
0.082
lit atm
m
o
l
−
1
K
−
1
]
View Solution
Q5
For a hypothetical reaction
4
A
+
5
B
⇋
4
P
+
6
Q
,
The equilibrium constant
K
c
has units
View Solution