Question

In a chemical reaction, what is the name of the substance that speeds up the reaction without being consumed?

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

Hint:

{Catalyst = speeds up reaction + not consumed}.

Answer 1

The Correct Option is C

Concept: A catalyst is a substance that increases the rate of a chemical reaction without being permanently consumed or undergoing any permanent chemical change. Catalysts work by lowering the activation energy required for a reaction to occur.
Step 1: Understand the function of a catalyst.
By reducing the activation energy barrier, a catalyst allows more molecules to react successfully, thereby speeding up the reaction.
Step 2: Eliminate other options.

• Reactants are substances that take part in a reaction.
• Products are substances formed after the reaction.
• Solvent dissolves substances but does not necessarily speed up reactions.

Thus, the substance that speeds up a reaction without being consumed is a catalyst.