A student draws four reaction profiles, A, B, C and D.

Which diagram shows an endothermic reaction with the activation energy shown correctly?
Diagram A
Diagram B
Diagram C
Diagram D
106 exam-style questions on OCR GCSE Chemistry 3.2 Energetics, covering 3.2.1 Exothermic and endothermic reactions and reaction profiles and 3.2.2 Calculating energy change from bond energies. Each one has a worked solution and a mark scheme showing where the marks go.