Question

Consider the overall reaction.... A+B--C+D which has an observed rate law of Rate=k[A12 Which of the following choices would be a sensible 2-step mechanism, given this observed rate law? O A+A-->E slow E+B-->C+D fast A+B--> 2 E --> C+D fast slow A+A-->E E+B-->C+D fast slow A+B-->E 2 E -->C+D slow fast

Answer 1

Rate of any reaction depend on it's slow mechanism. And rate of any mechanism depends on the reactant of that mechanism.

Then 2A should be the only reactant in a mechanism and the mechanism should be slow for rate equals k[A]2.

Therefore, out of available option the condition is satisfied only in 1st Option, then 1st Option is the correct answer.

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