Iodoform gives a precipitate with `AgNO_3`. Why ?

Iodoform gives a precipitate with silver nitrate on heating while chloroform does not ?

The complex [Co(NH_3)_5Br] SO_4 give white precipitates with BaCl_2 solution while [CO(NH_3)_5SO_4]Br give yellow precipitate with AgNO_3 solution. Explain.

An aqueous solution of [Pt(NH_3)_2Cl_2] gives white precipitate of AgCl with AgNO_3(aq) .

An aqueous solution of [Pt(NH_3)_2Cl_2] gives white precipitate of AgCl with AgNO_3(aq) .

Chloroform contains chlorine but does not give reaction with AgNO_3 why ?

Aqueous copper sulphate solution (blue in colour) gives: a green precipitate with aqueous potassium fluoride

A Compound with the empirical formula Co(NH_3)_5 BrSO_4 exists in two forms : red and violet. Solution of red gives a precipitate of AgBr on addition of AgNO_3 . The violet form Sives no precipitate on the addition at AgNO_3 but gives a white precipitate on addition of BaCl_2 solution. From these observations draw the structure of each compound and explain the observations.

Chlorobenzene gives a white precipitate with alcoholic silver nitrate solution.