Which component of a chemical reaction speeds up the reaction but is not consumed or permanently changed by the reaction?

• A. Product
• B. Reactant
• C. Catalyst
• D. Solvent

Answer: (C)

Verified step by step guidance

1. Understand the role of each component in a chemical reaction: Reactants are substances that start the reaction, Products are substances formed by the reaction, Solvents are the medium in which the reaction occurs, and Catalysts are substances that increase the reaction rate without being consumed.
2. Recall that a catalyst works by lowering the activation energy needed for the reaction to proceed, which speeds up the reaction.
3. Note that unlike reactants, catalysts are not used up or permanently changed during the reaction; they can be recovered unchanged at the end.
4. Recognize that products are formed as a result of the reaction and do not influence the speed of the reaction once formed.
5. Conclude that the component which speeds up the reaction but is not consumed or permanently changed is the catalyst.