Which of the following halogens produces oxygen when passed through a hot and concentrated solution of $KOH$?

Which of the following represents the outermost shell electronic configuration of halogens?

What is the correct order of thermal stability for halogen acids?

Write the reactions of $F_{2}$ and $Cl_{2}$ with water.

Among the following halogens $F_2$,$Cl_2$,$Br_2$ and $I_2$,which can undergo disproportionation reaction?

Phosphorus reacts with $SO_2Cl_2$ to form $PCl_5$ and $X$. At $723 \ K$,$HCl$ gas reacts with $O_2$ in the presence of $CuCl_2$ to form water and $Y$. $Y$ reacts with $X$ in water to form two acids $A$ and $B$. What are $A$ and $B$ respectively?