Question

what will most likely happen if an appropriate enzyme is added to a chemical reaction?
the equilibrium of the reaction will be maintained.
the reaction rate will increase.
the reaction will stop.
the reaction rate will decrease.

Explanation:

Enzymes are biological catalysts that speed up chemical reactions by lowering the activation energy. They do not affect the equilibrium of a reaction (so the first option is wrong), nor do they stop the reaction (third option wrong) or decrease the reaction rate (fourth option wrong). Instead, adding an appropriate enzyme will increase the reaction rate.

Answer:

The reaction rate will increase. (Corresponding to the second option among the given choices: "The reaction rate will increase.")