The order in which the following oxides are arranged according to decreasing basic nature is

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Na2O, MgO, Al2O3, CuO

MgO,Al2O3, CuO, Na2O

Al2O3,MgO, CuO, Na2O

CuO, Na2O,MgO, Al2O3

answer is A.

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Detailed Solution

Na2O, MgO, Al2O3, CuO. The more the metallic character the higher the e− donating tendency. Therefore, lower the IE more the basic nature of oxide.

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