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Q. Among the following, the one which is most basic is

AIPMTAIPMT 1994The s-Block Elements

Solution:

ZnO and $Al_2O_3$ are amphoteric oxide, $N_2O_5$ is oxide of non-metal, so it is acidic and hence, MgO is most basic among $Al_2O_3, ZnO, N_2O_5$ and MgO.