A white amorphous powder (A) on strongly heating gives a colourless non-combustible gas (B) and solid (C). The gas (B) turns lime water milky and turbidity disappears with the passage of excess of gas.The solutionof (C) in dilute HCl gives a white ppt. with an aqueous solution of K_(4)[Fe(CN)_(6)]. The solution of (A) in dilute HCl gives a white ppt. (D) on passingH_(2)S in presence of excess of NH_(4)OH. Identify (A) to (D) by giving chemical equations.

A white amorphous powder (A) on strongly heating gives a colourless no

1.	A white amorphous powder (A) on strongly heating gives a colourless non-combustible gas (B) and solid (C). The gas (B) turns lime water milky and turbidity disappears with the passage of excess of gas.The solutionof (C) in dilute HCl gives a white ppt. with an aqueous solution of K_(4)[Fe(CN)_(6)]. The solution of (A) in dilute HCl gives a white ppt. (D) on passingH_(2)S in presence of excess of NH_(4)OH. Identify (A) to (D) by giving chemical equations.
Answer» Solution :`{:((A)-ZnCO_(3),(B)-CO_(2)),((C)-ZNO,(D)-ZnS):}` (i) `underset((A))(ZnCO_(3))rarrunderset((C))(ZnO)+underset((B))(CO_(2))` (ii) `underset((B))(CO_(2))+Ca(OH)_(2)rarr underset("White")(CaCO_(3)+H_(2)O)` `CaCO_(3)+H_(2)O+CO_(2) rarr underset("Excess Soluble")(Ca(HCO_(3))_(2))` (III) `ZnO+2HCl rarr ZnCl_(2)+H_(2)O` `2ZnCl_(2)+K_(4)Fe(CN)_(6) rarr underset("White ppt.")(Zn_(2)[Fe(CN)_(6)]+4KCl)` (iv) `ZnCl_(2)+H_(2)S rarr ZnS+underset((D))(2HCl)`