(i)When silver nitrate solution is added to a salt solution of (A), a black precipitate is - obtained. (A) decolourizes acidified permanganate solution. Identify the acid radical in (A) (ii) On heating the salt, decripitation takes place. On heating a mixture of salt, manganese dioxide and conc. H_2SO_4, a greenish yellow gas is evolved. The gas evolved turned moist blue litmus red and then turned it colourless. On performing the flame test, the salt imparted a crimson red colour to the flame. Identify the cation and anion in the salt.

(i)When silver nitrate solution is added to a salt solution of (A), a

1.	(i)When silver nitrate solution is added to a salt solution of (A), a black precipitate is - obtained. (A) decolourizes acidified permanganate solution. Identify the acid radical in (A) (ii) On heating the salt, decripitation takes place. On heating a mixture of salt, manganese dioxide and conc. H_2SO_4, a greenish yellow gas is evolved. The gas evolved turned moist blue litmus red and then turned it colourless. On performing the flame test, the salt imparted a crimson red colour to the flame. Identify the cation and anion in the salt.
Answer» Solution :(i) The acid radical must be sulphide . `S^(2-)+2AgNO_3toAg_2S+2NO_(3)^(-)` `5S^(2-)+2MnO_4^(-)+16Hto5S+2Mn^(2+)+8H_2O` (ii)The greenish yellow gas envoled is chlorine. `2CL^(-)+MnO_2+2H_2SO_4toMnSO_4+2H_2O+Cl_2+SO_4^(2-)` `Cl_2+H_2Oto 2HCl+(O)` Vegetable dyw(o)`to`Colorless OXIDATION product `:.` the acid radical in the salt is choride SINCE crimson red color is imparted the BASIC radical is strotium.