Which term best describes a substance that increases the rate of a chemical reaction without being consumed or permanently altered in the process?

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

Answer: (A)

Verified step by step guidance

1. Understand the definition of each term: A reactant is a substance that participates in and is consumed during a chemical reaction.
2. A product is a substance formed as a result of a chemical reaction.
3. An inhibitor is a substance that decreases the rate of a chemical reaction.
4. A catalyst is a substance that increases the rate of a chemical reaction without being consumed or permanently altered.
5. Identify that the term describing a substance that speeds up a reaction without being used up is 'catalyst'.