Question

Which of the following graphs represents the highest activation energy for a forward reaction if the reaction is endothermic?

• A.
• B.
• C.
• D.

Answer 1

The correct option is C

Here the first two options represent exothermic reactions.
Options (c) and (d) are endothermic reactions. Activation energy is the difference between the energy of the reactants and the energy of the transition state of the reaction.
Comparing the two, option (c) has the highest activation energy for a forward reaction.