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JEEMAIN-2015
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Q)
For the equilibrium,
A
(
g
)
→
B
(
g
)
,
Δ
H
is
−
40
k
J
/
m
o
l
. If the ratio of the activation energies of the forward
(
E
f
)
and reverse
(
E
b
)
reaction is
2
3
then
E
f
=
60
k
J
/
m
o
l
;
E
b
=
100
k
J
/
m
o
l
E
f
=
30
k
J
/
m
o
l
;
E
b
=
70
k
J
/
m
o
l
E
f
=
80
k
J
/
m
o
l
;
E
b
=
120
k
J
/
m
o
l
E
f
=
70
k
J
/
m
o
l
;
E
b
=
30
k
J
/
m
o
l
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