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WAEC Chemistry 2010 Objective — Question 28

Question 28 of 49 from the West African Examinations Council (WAEC) Chemistry 2010 Objective paper, with the correct answer and a full explanation.

Which of the following oxides is basic?

A. A. NO2
B. B. Al2O3
C. C. SO2
D. D. CaOCorrect

Explanation

NO2 and SO2 are acidic oxides, Al2O3 is amphoteric, while CaO is basic.

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