Chemistry - Complete Pblock- Question with Solution | TestHub

Question Explanation:

Identify the correct periodic order for the given properties of Halogens (F,Cl,Br,I).

Concept: Periodic trends in Halogens.

(A) $\mathrm{F}<\mathrm{Cl}<\mathrm{Br}<\mathrm{I}$ (Atomic Radius) (Correct - Ar increases down the group).

(B) $\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$ (Ionisation Enthalpy) (Correct - IE decreases down the group).

(C) $\mathrm{F}>\mathrm{Cl}>\mathrm{Br}>\mathrm{I}$ (Electron affinity) (Incorrect - Cl has the highest $\mathrm{EA}:\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}$ ).

(D) ${\mathrm{F}}_2<{\mathrm{Cl}}_2<{\mathrm{Br}}_2<{\mathrm{I}}_2$ (Bond length ( $\mathrm{X}-\mathrm{X}$ )) (Correct - Bond length increases down the group).