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Monitoring reactions by pressure, titration and optical rotation
NEET level
Single correct option
Difficulty 1 of 3
ck116
A first-order reaction
A
(
g
)
2
B
(
g
)
starts with pure A at pressure
P
0
in a rigid vessel. The total pressure after exactly one half-life is
A
2
P
0
B
1.5
P
0
C
1.25
P
0
D
P
0
Answer: B
After one half-life
p
A
=
P
0
/2
and
p
B
=
2
(
P
0
/2
)
=
P
0
. The total pressure is
P
0
/2
+
P
0
=
1.5
P
0
.
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