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KVPY SA Exam 2013 Question Paper
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© examsnet.com
Question : 40
Total: 80
The equilibrium constant,
K
c
for
3
C
2
H
2
(
g
)
⇌
C
6
H
6
(
g
)
is
4
L
2
mol
−
2
. If the equilibrium concentration of benzene is
0.5
mol
L
−
1
, that of acetylene in
mol
L
−
1
must be
0.025
0.25
0.05
0.5
Validate
Solution:
K
c
=
[
C
6
H
6
]
[
C
2
H
2
]
3
4
=
0.5
[
C
2
H
2
]
3
⇒
[
C
2
H
2
]
3
=
0.5
4
=
1
8
⇒
[
C
2
H
2
]
=
1
2
=
0.5
© examsnet.com
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