Question

What is required for a chemical reaction to occur?(1) standard temperature and pressure(2) a catalyst added to the reaction system(3) effective collisions between reactant particles(4) an equal number of moles of reactants and products

Answer 1

I think the correct answer is option 3. A requirement for a chemical reaction to happen is an effective collisions between the reactant particles because it is where the electrons in the reactants interact with each other and form new substances.