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An exothermic chemical reaction proceeds...

An exothermic chemical reaction proceeds by two stages.
Reactions `overset("stage" 1)(to)` Intermediate `overset("Stage" 2)(to)` Products. The activation enregy of state 1 is 50 kJ `mol^(-1)` The overall energy of state 1 is 50 kJ `mol^(-1)`. The overall enthalpy change for the reaction is - 100 kJ `mol^(-1)`. Which diagram could represent the energy level diagram for the reaction?

A

B

C

D

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Verified by Experts

The correct Answer is:
3
Two step process with negative `DeltaH` , hence option `(3)` is obvious.
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