Which of the following oxides is basic?

Assessment: WAEC SSCE - Chemistry - 2010 (Objective) Subject: Chemistry

Question 1 Report

Which of the following oxides is basic?
Answer Details
Out of the given options, CaO is a basic oxide. Basic oxides are also called alkaline oxides or simply bases, which have a pH value greater than 7. When they react with water, they produce metal hydroxides, which are also bases. CaO, or calcium oxide, is a metal oxide that reacts with water to produce Ca(OH)2, which is a strong base. In contrast, NO2 and SO2 are acidic oxides, and Al2O3 is an amphoteric oxide, which means it can behave as either an acid or a base depending on the conditions.
Read lesson note on Acids, Bases And Salts (Ghana Only) (WAEC)
Read lesson note on Periodic Chemistry (Ghana Only) (WAEC)
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