Published by:
CGP EDU Academic Team
Published on: August 21, 2026
Reaction: 
.
At 
, only 
is present with initial pressure 
in a fixed-T, fixed-V vessel. After time 
, the total pressure of the mixture is P. The reaction is first order in A. Which of the following relation correctly gives the total pressure P at time t in terms of 
, and t ?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
For 
, total moles 
4 x if x moles of A react 
with 
First-order in A: fraction reacted 
.
So
.
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