Question
Question: Which one of the following orders presents the correct sequence of the increasing basic nature of th...
Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides ?
A
Al2O3 <MgO< Na2O < K2O
B
MgO< K2O < Al2O3 < Na2O
C
Na2O < K2O <MgO< Al2O3
D
K2O < Na2O < Al2O3<MgO
Answer
Al2O3 <MgO< Na2O < K2O
Explanation
Solution
As metallic character of element attached to oxygen atom increases (on moving top to bottom or right to left in Modern periodic table), the difference between the electronegativity values of element and oxygen increases and thus basic character of oxides increases and vice-versa. Hence the increasing correct order of basic nature is Al2O3 < MgO < Na2O < K2O.