Chemistry - Salt Analysis Question with Solution | TestHub
A salt (X), which produces a golden yellow color flame, reacts with dilute HCl to produce a poisonous gas (G₁) with an odor reminiscent of bitter almonds. Salt (X) also produces another poisonous, odorless gas (G₂) when reacted with concentrated H₂SO₄.
Aq. solution of (X) (excess) produce soluble complex salt [ ] with solution. Aqueous solution of salt produce dark blue coloration with solution.
Select CORRECT opionts(s) :-
Options:(select one or more)
Answer:
Solution:
Salt X is a cyanide compound as it produces HCN gas (G₁) with dilute HCl (bitter almond smell) and another gas (CO-like, G₂) with conc. H₂SO₄. CN⁻ forms complexes like which give Prussian blue color with Fe³⁺. HCN gas is absorbed by ammoniacal cuprous chloride solution, confirming its presence. CN⁻ is a triatomic species (C–N–H in HCN). Also, cyanide-related complexes show characteristic reactions with CuSO₄ leading to brown CuCN precipitate. Hence, correct options are (A), (C), (D).