Which of the following transitions involves maximum amount of energy?

Options

A. `M^(-) 9g) to M(g)`
B. `M(g) to M^(+) (g) `
C. `M^(+) (g) to M^(2+) (g)`
D. `M^(2+) (g) to M^(3+) (g)`

Answer

D

Explanation

`M^(2+) to M^(3+)` After the removal of `2e^(-)` the nuclear charge per `e^(-)` increases, due to which high energy is required to remove `3e^(-)`.