Chemistry - Complete Pblock- Question with Solution | TestHub

All the halogens are coloured. The colour deepens with the rise of atomic number from fluorine to iodine. The colour is due to the absorption of energy from visible light by their molecules or excitation of outer electrons to higher energy levels. $$\begin{array}{llll}\mathrm{F}& \mathrm{Cl}& \mathrm{Br}& \mathrm{I}\\ \text{ Light }& \text{ Yellow }& \text{ Reddish }& \text{ Deep }\\ \text{ yellow }& \text{ green }& \text{ brown }& \text{ violet. }\end{array}$$