Which statement must be true for a reaction to occur?

Question

reactant molecules must have low surface area

reactants must be at a lower energy state than products

Products must be at a lower energy state than reactants

molecules must collide with energy greater than or equal to the Ea

Answer 1

molecules must collide with energy greater than or equal to the Ea is the true statement.

reactant molecules must have low surface area - not true. In fact greater surface area = greater rate

reactants must be at a lower energy state than products - only true for endothermic reaction. Not so for exo

Products must be at a lower energy state than reactants - only true for exothermic, not so for endothermic