1.

Which one of the following statement is correct?

Answer»

From a mixed precipitate of `AgCl` and `Agl`,ammonia solution dissolves only `AgCl`
Ferric ions gave a deep green precipitate on adding potassium ferrocyanide solution.
On BOILING a solution having `K^(+),Ca^(2+)` and `HCO_(3)^(-)` ions we get a precipitate of `K_(2)Ca(CO_(3))_(2)`
Manganese salts give a violet borax bead test in the reducing flame

Solution :(1)`AgCl+2NH_(3)to[Ag(NH_(3))_(2)Cl` (colourless soluble COMPLEX), `Agl+2NH_(3) to` No reaction
(2)`Fe^(3+)+[Fe(CN)_(6)]^(4-) to Fe_(4)[Fe(CN)_(6)]_(3)` (prussian blue colouration or ppt.)
(3)`2KMCO_(3)OVERSET(Delta)toK_(2)CO_(3)+H_(2)O +CO_(2),Ca(HCO_(3))_(2) overset (Delta) to CaCO_(3)+H_(2)O +CO_(2)`
(4)In reducing flame the bead is colourless.It is violet in oxidising flame.


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