Question

Which of the following occurs when a catalyst is used in a chemical reaction?

A. the catalyst speeds up the rate of the chemical reaction
B. the catalyst always brings the reactants close together
C. the catalyst is permanently changed by the reaction
D. the catalyst increases the activation energy needed for the reaction to take place

Answer 1

Definitely A. Catalysts speed up the rate of chemical reactions by reducing the activation energy because they provide alternate reaction pathways.

Answer 2

b might be correct

Step-by-step explanation:

because alcohol react complete different manner in presence of catlyst