Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ?

Which one of the following order represents the correct sequence of th

1.	Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ?
Answer» `MGO lt K_(2)O lt Al_(2) O_(3) lt Na_(2)O` `Na_(2)O lt K_(2)O lt MgO lt Al_(2)O_(3)` `K_(2)O lt Na_(2)O lt Al_(2)O_(3) lt MgO` `Al_(2)O_(3) lt MgO lt Na_(2)O lt K_(2)O` Solution :Metallic character decreases ACROSS a period in the sequence as Na , Mg , Al and INCREASES down the group in the sequence as Na , K . As metallic character of the ELEMENT attached to oxygen atom increases, the basic character of oxides increases . Hence , the INCREASING correct order of basic nature is `Al_(2)O_(3) lt MgO lt Na_(2)O lt K_(2)O`.