MolSynapsequestion bank

MolSynapse / Question bank / Chemical Kinetics / Parallel, consecutive and reversible reactions, catalysis

JEE Main levelOne or more correct optionsDifficulty 2 of 3ck180

Which statements about a catalyst in a reversible reaction are correct?

AIt does not change the equilibrium constant at a given temperature.
BIt changes $Δ H$ of the reaction.
CIt makes $Δ G^{\circ}$ of the reaction more negative.
DIt provides a reaction path with lower activation energy.

Answer: A, D

A catalyst alters the path, lowering both activation energies. State functions such as

Δ H

and

Δ G^{\circ}

depend only on initial and final states, so they are unchanged, and hence

K = e^{- Δ G^{\circ} / RT}

is also unchanged.

Practice Chemical Kinetics More on Parallel, consecutive and reversible reactions, catalysis

Previous questionNext question

More questions on Parallel, consecutive and reversible reactions, catalysis