Question

What is the definition of a catalyst?

Group of answer choices
1. A substance that speeds up a reaction while being consumed in the process
2. A product in a chemical reaction
3. A substance that dissolves all the reactants
4. A reactant in a chemical reaction
5. A substance that speeds up a reaction without being consumed in the process

Answer 1

I think the best answer is (5) because catalyst are known to speed up a reaction without being changed