Which of the following arrangement for the three halogens Cl, Br and I when placed in the order of their increasing electron affinity is correct ?

Options

A. Cl, Br, I
B. I, Br, Cl
C. Br, Cl , I
D. I, CI, Br.

Answer

B

Explanation

Except for F. electron affinity decreases down the group. Thus, correct order of increasing electron affinities of Cl, Br and I is :
I lt Br lt Cl.