Question

Which of the following statement(s) is/are $NOT$ correct regarding chemical catalysts?

• A. They are not consumed during the chemical reaction.
• B. They cannot make non-spontaneous reactions occur.
• C. They do not have to be the same phase as the reactant molecules.
• D. They shift equilibrated reactions to the product's side.

Answer 1

The correct option is D They shift equilibrated reactions to the product's side.

Catalyst only alters the pathway of reaction by lowering the activation energy. They don't use in any reaction and remain unconsumed after the reaction.

Since they are lowering the activation energy so reactants easily cross the barriers and make no-spontaneous reactions occur

It is not necessary that catalysts are in the same phase with reactants such catalysis called heterogeneous catalysis.
For eg. $2S{O}_2\left(g\right)\stackrel{Pt\left(s\right)}{\to }2S{O}_3\left(g\right)$

The equilibrium constant does not change in reaction by the catalyst which means that equilibrium doesn't shift in any direction. Hence option D is not correct.