Question

Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?
A. `Al_(2)O_(3) ltMgOltNa_(2)OltK_(2)O`
B. `MgOltK_(2)O ltAl_(2)O_(3)ltNa_(2)O`
C. `Na_(2)O ltK_(2)OltMgOltAl_(2)O_(3)`
D. `K_(2)OltNa_(2)OltAl_(2)O_(3)ltMgO`

Answer 1

Correct Answer - A
As metallic character of element attached to oxygen atom increases, the difference between the electronegativity values values of element and oxygen increaes and thus basic character or oxidised increases and vice-versa. Hence the increaseing correct order of basic nature is
`Al_(2)O_(3)ltMgOltNa_(2)OltK_(2)O`.