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Second order and pseudo first order reactions
JEE Main level
Single correct option
Difficulty 2 of 3
ck071
The rate constant of a second order reaction is
2.5
×
1
0
−
3
L
mo
l
−
1
s
−
1
. Expressed in
m
3
mo
l
−
1
mi
n
−
1
(use
1
L
=
1
0
−
3
m
3
) it is
A
4.2
×
1
0
−
8
m
3
mo
l
−
1
mi
n
−
1
B
1.5
×
1
0
2
m
3
mo
l
−
1
mi
n
−
1
C
1.5
×
1
0
−
4
m
3
mo
l
−
1
mi
n
−
1
D
1.5
×
1
0
−
1
m
3
mo
l
−
1
mi
n
−
1
Answer: C
1
L
=
1
0
−
3
m
3
and
1
min
=
60
s
, so one reciprocal second becomes 60 reciprocal minutes. Thus
k
=
2.5
×
1
0
−
3
×
1
0
−
3
×
60
=
1.5
×
1
0
−
4
m
3
mo
l
−
1
mi
n
−
1
.
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