Analytical ChemistryHard
Question
Select the incorrect statement(s).
Options
A.Ammonium ions produce yellow colour solution with sodium hexanitrito-N-cobaltate (III).
B.Ammonia gas develops a brown colour on filter paper moistened with a solution of MnCl2 and H2O2.
C.Ammonium ions produce white precipitate with saturated sodium hydrogen tartrate solution.
D.Ammonium salts in presence of sodium hydroxide solution produces red precipitate with 4-nitrobenzene diazonium chloride reagent.
Solution
(A) 3NH4+ + [Co(NO2)5]3- → (NH4)3[Co(NO2)6]↓ (yellow)
(B) 2NH3 + Mn2+ + H2O2 + H2O → MnO(OH)2↑ (brown) + 2NH4+
(C) NH4+ + HC4H4O6- → NH4HC4H4O6 ↑ (white)
(D) O2N
N = N - Cl + NH4+ + 2OH- → O2N 
N = NONH4 (red colouration) Cl- + H2O
(B) 2NH3 + Mn2+ + H2O2 + H2O → MnO(OH)2↑ (brown) + 2NH4+
(C) NH4+ + HC4H4O6- → NH4HC4H4O6 ↑ (white)
(D) O2N
N = N - Cl + NH4+ + 2OH- → O2N N = NONH4 (red colouration) Cl- + H2OCreate a free account to view solution
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