Which of the following is not an accurate description of chemical reactions?
    
  A. The rates of chemical reactions can vary.
  B. During chemical reactions, energy can be released or used up.
  C. Chemical reactions that take in energy never need a source of energy to start.
  D. During chemical reactions, bonds can be broken or formed.
don't answer unless you know for sure that it is right. if I fail this, then I have to redo highschool. (I'm in pennfoste4)

Respuesta :

It's C.

All chemical reactions will always need activation energy.
The answer is C. I just had it on my test.