WAEC Chemistry 2015 Objective — Question 30

Question 30 of 50 from the West African Examinations Council (WAEC) Chemistry 2015 Objective paper, with the correct answer and a full explanation.

Which of the following oxides can be reduced by hydrogen?

A. Aluminium oxide
B. Magnesium oxide
C. Sodium oxide
D. Silver oxideCorrect

Explanation

Silver oxide, being a less reactive metal oxide, can be reduced by hydrogen gas; aluminium, magnesium and sodium oxides are too stable to be reduced by hydrogen.

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