The gas librated , onheating amixtureof two salts with NaOHgive sa reddish brownprecipitate with analkline solutionof K_(2)HgI_(4) the aqeoussolutionof the mixtureon treatmentwith BaCI_(2) givesawhiteprecipitatewhichis sparinglysoluble with K_(2)Cr_(2)O_(7) and concentratedH_(2)SO_(4)red vapour of A areproduced .The aqueoussolution of the mixturegivesa deep -bluecolourationB withpotassiumferrcyanidesolubleidentifythe redicals in thegivesmixtureand writethebalancedequationin thegivesmixtureandwritethebalanced equationsfor theformationof A and B

The gas librated , onheating amixtureof two salts with NaOHgive sa red

1.	The gas librated , onheating amixtureof two salts with NaOHgive sa reddish brownprecipitate with analkline solutionof K_(2)HgI_(4) the aqeoussolutionof the mixtureon treatmentwith BaCI_(2) givesawhiteprecipitatewhichis sparinglysoluble with K_(2)Cr_(2)O_(7) and concentratedH_(2)SO_(4)red vapour of A areproduced .The aqueoussolution of the mixturegivesa deep -bluecolourationB withpotassiumferrcyanidesolubleidentifythe redicals in thegivesmixtureand writethebalancedequationin thegivesmixtureandwritethebalanced equationsfor theformationof A and B
Answer» Solution :The mixture contain `NH_(4)^(Theta) , CI^(Theta) ,SO_(4)^(Theta) ,Fe^*(2+)` i. Gas is clearly ammonia` rArrNH_(4)^(Theta)` is confiemed iiiWhite ppt `overset(HCI)` to sparingly soluble `RARR SO_(4)^(2-)` ion is present III Red vapour are produced `K_(2)Cr_(2)O_(3) + H_(2)SO_(4) + ? rarr ` REd vapour `(rArr Cr_(2)CI_(2)`chromyl CHLORIDE) Hence `CI^(Theta)` ion is present iv Test indicates `Fe^(2+)` `Fe^(2+) + [Fe(CN)_(6)]^(2+) rarr Fe^(3+) + underset("Deep blue")(Fe_(4)[Fe(CN)_(6)]_(3))`