JEE Main Chemistry question

ChemistryChemical KineticsJEE Main

A hypothetical reaction follows the mechanism given below,

A+A\ (fast)

A+→ AB+B\ (slow)

A+B→ AB\ (fast)

The order of the overall reaction is

Answer: (C)

Solution

The rate-determining (slow) step gives rate . From the fast pre-equilibrium, , so

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Question ID VK-144240