Question

Which is the best definition of activation energy?

Answer 1

"Which" ?

Answer 2

Which is the best definition of activation energy?
the energy required to end a chemical reaction
the energy required to bind a substrate to an active site
the energy required to break the bonds of reactant molecules
the energy required to re-form bonds in product molecules

Answer 3

This question sucks as the choices are so vague. Both C and D can be interpreted to be the correct answer. But I'd go with C in this case.