Question

Arrange the following in increasing basic strenth BeO, Mgo,Bao,Cao​

Answer 1

According to fajans rule :

As the size of cation increase polarisation power Decrease and ionic character increase hence , basicity increases down the group.

And , down the group size increase.

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Arranging the following in increasing basic strength :

BeO < MgO < CaO < BaO