The order in which the following oxides are arranged to decreasing basic nature is $C u O, N a_{2} O, M g O, A l_{2} O_{3}$

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Solution

An oxide is that chemical compound which has a chemical formula containing at least one oxygen atom and one other element. Oxide is a dianion of oxygen. Oxides can be called as binary compounds formed by the reaction of oxygen with other elements. Oxides are classified as acidic, basic, neutral and amphoteric based on their characteristics.
Na2O, MgO, Al2O3, CuO is the decreasing order of basic nature.

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