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  4. The element that does NOT form acidic oxide is

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Q. The element that does NOT form acidic oxide is

MHT CETMHT CET 2016

Solution:

The acidic oxides are formed by the non-metals (group 14-17) whereas basic oxides are formed by the metals of group 1 and group 2 elements.
As the atoms get larger, the ionisation energy decreases and the elements also become more basic. $BeO$ is an amphoteric oxide, $MgO$ is weakly basic while $BaO$ is highly basic oxide.