Which of the following graphs between potential energy (y-axis) vs reaction coordinate (x-axis) correctly represents the reaction profile of ? [2026]

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Solution

Q.
$A \to D$ is an endothermic reaction occurring in three steps (elementary).

(i) $A \to B Δ H_{i} = + ve$

(ii) $B \to C Δ H_{i i} = - ve$

(iii) $C \to D Δ H_{i i i} = - ve$

Which of the following graphs between potential energy (y-axis) vs reaction coordinate (x-axis) correctly represents the reaction profile of $A \to D$ [2026]

1

2

3

4

Ans.
(2)

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