WAEC Chemistry 2025 Objective — Question 43
Question 43 of 50 from the West African Examinations Council (WAEC) Chemistry 2025 Objective paper, with the correct answer and a full explanation.
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Which of the following oxides is amphoteric?
- A. CaO
- B. MgO
- C. BaO
- D. BeOCorrect
Explanation
An amphoteric oxide can react both as an acid and as a base. Examples include Al2O3, ZnO, SnO and BeO. CaO, MgO and BaO are basic oxides.
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