Question

For an exothermic chemical process occurring in two steps as follows
(i) $A+B\to X$ (slow)
(ii) $X\to AB$ (fast)
The progress of reaction can be best described by:

• A.
• B.
• C.
• D.

Answer 1

Answer: (C)

First step is slow (require more activation energy), second step is fast (less activation energy) and overall reaction is exothermic, so product energy level should be less as compared to reactants.