question_answer

A colourless water soluble solid A on heating gives equimolar quantities of B and C. B gives dense white fumes with HCl and C does so with \[N{{H}_{3}}\]. B gives brown precipitate with Nessler's reagent and C gives white precipitate with nitrates of \[A{{g}^{+}},P{{b}^{+}}\]and \[H{{g}^{+}}\]. A is

A) \[\text{N}{{\text{H}}_{\text{4}}}\text{Cl}\]                        

B) \[\text{N}{{\text{H}}_{\text{4}}}\text{C}{{\text{O}}_{\text{3}}}\]

C) \[\text{N}{{\text{H}}_{\text{4}}}\text{N}{{\text{O}}_{2}}\]                        

D) \[FeS{{O}_{4}}\]