The correct order of increasing electron affinity of the following elements is:

Options

A. O lt S lt F lt Cl
B. O lt S lt Cl lt F
C. S lt O lt F lt Cl
D. S lt O lt Cl lt F

Answer

A

Explanation

Along the period, EGE increases so, F > O , Cl > S Also E.N. of Cl < F & S < O because of small size of F & O, they become unstable after gain of `e^(-)` due to interelectronic repulsion which doesn’t happen in case of Cl, S due to their comparatively bigger size.