Analytical ChemistryHard

Question

Which one of the following statements is correct?

Options

A.From a mixed precipitate of AgCl and AgI, ammonia solution dissolves only AgCl
B.Ferric ions give a deep green precipitate on adding potassium ferrocyanide solution
C.On boiling a solution having K+, Ca2+ and HCO3- ions we get a precipitate of K2Ca(CO3)2.
D.Manganese salts give a violet borax bead test in the reducing flame

Solution

Ammonia can dissolve ppt. of Agcl only due to formation of complex as given below:
AgCl + 2NH3 → [Ag(NH3)2] Cl

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