Metal oxides on reacting with strong acids produce salt and water (similar to the reaction of bases with acids). Hence, metal oxides are also known as basic oxides.
explain
Metal oxides are said to be basic oxides because they react with acids in the similar way by which bases reacts with an acid.
i.e base + acid ------>salt +water
e.g. sodium hydroxide + hydrochloric acid ==> sodium chloride + water
NaOH + HCl ==> NaCl + H2O similarly
metal oxides +acid-----> salt + water
e.g. metal oxide + acid ==> salt + water
Black copper (II) oxide dissolves in colourless sulfuric acid to give a blue solution of copper(II) sulfate from which the salt can be crystallised.
copper(II) oxide + sulphuric acid ==> copper(II) sulphate + water
CuO + H2SO4 ==> CuSO4 + H2O