Which of the following process requires the largest amount of energy ?

Options

A. `Al (g) to Al^(+) (g) +e^(-)`
B. `Al^(2+)(g)toAl^(3+) (g)+e^(-)`
C. `Al^(+)(g) to Al^(2+) (g) +e^(-)`
D. All the processes require same amount of energy

Answer

B

Explanation

it refers to `IE_(3)` which has a higher value.