Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The decomposition of phosphine 
on tungsten at low pressure is a first-order reaction.
It is because the
Text Solution
Verified by ExpertsThe correct answer is:
A
This is an example of surface catalysed unimolecular decompositon.
For the above reaction, rate is given as
where, 
partial pressure of absorbing substrate.
At low pressure, 
or Rate 
So, 
can be neglected.
Thus, the decomposition is predicted to be first order.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The hydrolysis of ethyl acetate
is the reaction of:
Under what conditions a bimolecular reaction may be kinetically of first order?
The order of a reaction for an esterification process is :
For the reaction, , the reaction rate . Which
statement is true about this reaction?
Observe the following reaction.
The rate of this reaction is .
What is the value of in ?
If , , then