Which of the following transitions involves maximum amount of energy?

Options

A. `M_((g))^(-) to M_((g))`
B. `M_((g) to M_((g))^(+)`
C. `M_((g))^(+) to M_((g))^(2+)`
D. `M_((g))^(2+) to M_((g))^(2+)`

Answer

D

Explanation

`IE_1 lt IE_2 lt IE_3` . As after removing first electron ` = (Z/e)` ratio increases so Zeff increases so it becomes difficult to remove 2nd electron. hence more energy is required and same is the case with removal of 3rd electron.