KVPY SX SB Exam 05-Nov-2017 Question Paper

Question : 55 of 120

Marks: +1, -0

The enthalpy (H) of an elementary exothermic reaction A ⇌ B is schematically plotted against the reaction coordinate. The plots in the presence and absence of a catalyst are shown in dashed and solid lines, respectively. Identify the correct plot for the reaction.

Validate

Solution:

For exothermic reaction

∆H = E_P -E_R < 0

E_B -E_A < 0

E_B < E_A

Catalyst does not changes the initial and final position of the reaction so correct answer is (A)

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