Which letter represents the activated complex?
1. a
2. b
3. f
4. g

2. B.

Explanation:

The letter B represents the activated complex.The activated complex is the intermediate that is formed between the states of reactants "F" and products "G".Letter A represents the activation energy of the reaction, that is the difference in potential energy between the reactants "F" and activated complex "B".Letter C represents the enthalpy change of the reaction, that is the difference in potential energy between products "G" and reactants "F".Letter D represents the potential energy of products "G".Letter E represents the potential energy of reactants "E".