Group 17

Which of the following hydrogen halides react(s) with $\ce{AgNO3}$(aq) to give a precipitate that dissolves in $\ce{Na2S2O3}$(aq)?

Bleaching powder contains a salt of an oxoacid as one of its components. The anhydride of that oxoacid is

Reaction of $\ce{Br2}$ with $\ce{Na2CO3}$ in aqueous solution gives sodium bromide and sodium bromate with evolution of $\ce{CO2}$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is

All the compounds listed in Column I react with water. Match the result of the respective reactions with the appropriate options listed in Column II.