Question

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 1

(a) : While moving from left to right in periodic table basic character of oxide of elements will decrease.

And while descending in the group basic character of corresponding oxides increases.