Silver nitrate solution is kept in brown bottles in laboratory because :

3 AgNO gets decomposed by light. 116. A white precipitate of AgCl dissolves in excess of : (I) NH3 (aq) (II) Na2S2O3 (III) NaCN (a) III only (b) I, II, III (c) I, II (d) I only AgCl is soluble in all three. It forms complex ions. 3 2 2 3 + NH 3 2 3 Na S O 2 3 2 NaCN 2 AgCl Ag(NH ) AgCl Ag S O AgCl Ag CN -> -> -> 117. Boiling CuCl2 with Cu in conc. HCl gives : (a) CuCl (b) CuCl2 (c) H[CuCl2] (d) Cu2Cl