Chemistry - Salt Analysis Question with Solution | TestHub
A pale yellow solid (A) is insoluble in water but dissolves in hot conc. (with evolution of a brown gas and formation of acid (B). A white salt (C), derived from (B) and a strong base, satisfies:
G is a colourless, neutral gas that does not affect Nessler’s reagent and constitutes ~78% of air. When (C) is treated with freshly prepared FeSO4 & and conc. H2SO4, a brown ring appears. Further, D + B → (E).
(E) is soluble in water and does not undergo hydrolysis. How many of the following reagents give a precipitate when added separately to an aqueous solution of (E)? BaCl2 , Pb(NO3)2 , Hg(NO3)2 , MgCl2 , FeCl3 , CuCl2
Answer:
Solution:
Hot conc. gives brown with (A)
(anion: )
(C) + dil. brown ring
⇒ anion in (C)
On heating, nitrate of strong base metal :
(major atmospheric gas)
(E) Thus (E) metal sulfate
Precipitation Test (sulfate ion)
In aqueous :
soluble
no ppt
no ppt