• # question_answer The following mechanism has been proposed for the exothermic catalyzed complex reaction $A+BIAB\xrightarrow[{}]{{{k}_{1}}}AB+I\xrightarrow[{}]{{{k}_{2}}}Q+A$ If ${{k}_{1}}$ is much smaller than ${{k}_{2}},$ the most suitable qualitative plot of Potential Energy (PE) versus reaction coordinate (R.Co) for the above reaction. A)                    B) C) D)

 $A+BlAB$ so ${{E}_{a(f)}}$ its high and ${{E}_{a(b)}}$ is low $({{k}_{1}}<<{{k}_{2}});{{E}_{a}}$ for this step is very high and next step is low and overall reaction is exothermic.