In IV group analysis, \[N{{H}_{4}}OH\] is added before passing \[{{H}_{2}}S\] gas because

The sulphides of second group are soluble in \[N{{H}_{4}}Cl\]

The sulphides of IV group are insoluble in \[N{{H}_{4}}OH\]

The sulphides of other metals are soluble in is\[N{{H}_{4}}OH\]

The concentration of \[{{S}^{2-}}\] ions is increased

In IV group analysis, \[N{{H}_{4}}OH\] is added before passing \[{{H}_

1.	In IV group analysis, \[N{{H}_{4}}OH\] is added before passing \[{{H}_{2}}S\] gas because
A.	The sulphides of IV group are insoluble in \[N{{H}_{4}}OH\]
B.	The sulphides of other metals are soluble in is\[N{{H}_{4}}OH\]
C.	The concentration of \[{{S}^{2-}}\] ions is increased
D.	The sulphides of second group are soluble in \[N{{H}_{4}}Cl\]
Answer» D. The sulphides of second group are soluble in \[N{{H}_{4}}Cl\]

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In IV group analysis, \[N{{H}_{4}}OH\] is added before passing \[{{H}_{2}}S\] gas because

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