Which of the following arrangements shows the correct order of electron affinity of the four halogen atoms I,Cl,Br,F?

Options

A. `I lt Br lt F lt Cl `
B. `Cl lt Br lt F gt I`
C. `Cl lt F lt Br lt I`
D. `F ~~I`` gt Br lt Cl `

Answer

A

Explanation

Down the group, decreases but due to small size of F inter electronic repulsion makes its less stable as compared to Cl after accepting `e^-` .