1.

The decreasing order of basic character of K_2O, BaO, CaO and MgO is

Answer»

`K_2O GT BaO gt CaO gt MgO`
`K_2O gt CaO gt BaO gtMgO`
`MgO gt BaO gt CaO gt K_2O`
`MgO gt CaO gt BaO gt K_2O`

Solution :ALKALI metal OXIDES are very much basic. Down the group in the alkaline earth metal series, ionisation POTENTIAL DECREASES.


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