JEE Advanced levelOne or more correct optionsDifficulty 3 of 3g3220
Which statements are correct?
AA catalyst changes the equilibrium constant of a reaction by changing ΔG∘
BIn a strongly endothermic step the transition state resembles the products
CThe transition state of a strongly endothermic step is close to the reactants in structure
DIn a strongly exothermic step the transition state resembles the reactants
Answer: B, D
By the Hammond postulate the transition state resembles whichever side is closer in energy: products for an endothermic step, reactants for an exothermic one. A catalyst lowers the barrier but leaves ΔG∘ and K unchanged.