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 `MnCI_(2)` and `H_(2)O_(2)`
C. Ammonium ions produce white precipitate with saturated sodium hydrogen tertrate solution.
D. Ammonium salts in presence of sodium hydroxide solution produces red precipitate with 4-nitrobenzene diazonium chloride reagent

Answer

A, D

Explanation

(a) `underset(("Yellow ppt."))((NH_(4))_(3)[Co(NO_(2))_(6)]darr)`
(b) `2NH_(3)+ Mn^(2+) +H_(2)O_(2) +H_(2)O rarr underset(("Brown ppt"))(MnO(OH)_(2))darr +2NH_(4)^(+)`
(c) `NH_(4)^(+) +HC_(4) H_(4)O_(6)^(-) rarr underset(("White ppt."))(NH_(4)HC_(4)H_(4)O_(6)darr)`
(d)