Which of the following oxide has the maximum basicity?

Options

A. `La_2O_3`
B. `Pr_2 O_3`
C. `Sm_2O_3`
D. `Gd_2O_3`

Answer

A

Explanation

Basicity decrease from `La^(3+) " to " Lu^(3+)` Hence `La_2O_3` has maximum basicity.