Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Consider a first order gas phase decomposition reaction given below:
The initial pressure of the system before decomposition of A was 
. After lapse of time ‘t’ total pressure of the system increased by x units and became 
.
The rate constant k for the reaction is given as______
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
If x atm be the decreases in pressure of A at time t and one mole each of B and C is being formed, the increase in pressure of B and C will also be x atm each.
At t = 0 
0 atm 0 atm
At time t 
x atm x atm
Where 
is the initial pressure at time t=0
Where, 
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