WAEC Chemistry 2021 Objective — Question 43

Question 43 of 50 from the West African Examinations Council (WAEC) Chemistry 2021 Objective paper, with the correct answer and a full explanation.

43. The energy profile diagram illustrates

• A. an endothermic reaction.
• B. an exothermic reaction.Correct
• C. a spontaneous reaction.
• D. a redox reaction.

Explanation

Since the products end up at a lower energy than the reactants (energy is released), this is an exothermic reaction.

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