Which one of the following statement is correct ?

Options

A. From a mixed precipitate of `AgCl` and `AgI` , ammonia solution dissolves only `AgCl` completely.
B. `I^(-)`ions gives red precipitate with `Hg_(2)^(2+)` ions solution
C. On boiling a solution having `Ca^(2+),K` and `HCO_(3)` ions we get white precipitate.
D. `(1)` and `(3)` both

Answer

4

Explanation

`(1) AgCl` is soluble while Agl is partialy solubel in concentrated ammonia solution.
`K^(+)+Ca^(2+)+HCO_(3)^(-)overset(Delta)rarr CaCO_(2)darr+CO_(2) uarr+H_(2)O+K_(2)CO_(3)`