A certain inorganic compound (A) on heating loses water of crystallization. On further heating, a blackish brown powder (B) and two oxides of sulphur (C) and (D) are obtained The powder (B) on boiling with hydrochloric acids gives yellow solution (E). When `H_2S` is passed in (E) a white turbidity (F) and an apple green solution (G) is obtained. The solution (E) on treatment with thiocyanate ion gives blood red compound (H). Identify (A) to (H). .

A compound (A) is greenish crystalline salt, which gave the following reactions. (i)Addition of BaCl_(2) solution to the solution of (A) results in the formation of white precipitate (B) which is insoluble in dilute HCl . (ii)On heating (A) , water vapours and two oxides of sulphur (C ) and (D) are liberated leaving a red brown residue (E) . (iii) (E) dissolves in warm concentrated HCl to give a yellow solution (F) . (iv)Solution (F) on treatment with thiocyanate ions gives blood red coloured compound (G) . Identify the compounds from (A) to (G) .

An inorganic compound (A) loses its water of crystallisation on heating and its aqueous solution gives the following reactions: a. It gives a white turbidity with dil HCI. b. It decolourises a solution of iodine in KI.

An unknown inorganic compound (X) loses it water of crystallisation on heating and its aqueous solution gives the following reaction. (i) It gives a white turbidity with dilute hydrochloric acid solution. (ii) It decolourises a solution of iodine in potassium iodide. (iii) It gives a white precipitate with silver nitrate solution which turns black on standing. Identify the compound (X) and give chemical equations for the reaction at step (i) to (iii).

A black mineral (A) on heating in presence of air gives a gas (B). The mineral (A) on reaction with dilute H_(2)SO_(4) gives a gas (C) and a solution of a compound (D) on passing the gas (C) into an aqueous solution of (B), a white turbidity is obtained. The aqueous solution of (D) on reaction with potassium ferricyanide gives a blue compound (E). Identify (A) to (E) and give chemical equations for the reaction involved.

A sulphide ore (A) on roasting leaves a residue (B). (B) on heating with chlorine gives (C), soluble in water, addition of excess potassium iodide to a solution of (C) gives a solution (D). A brown precipitate (E) is formed when a solution of ammonium sulphate is added to an alkaline solution of (D). Identify (A) to (E).

A sulphide ore (A) on roasting leaves a residue (B) . (B) on heating with chlorine gives (C ) , sulphide in water, addition of excess potassium iodide to a solution of (C ) gives a solution (D) A brown precipitate (E) is formed when a solution of ammonium sulphate is added to an alkaline a solution of (D) . Identify (A) to (E) .

An queous solution of a substance gives a white precipitate on treating with dilute hydrochloric acid which dissolves on heating. When hydrogen sulphide is passed through the hot solution, a black precipitate is obtained. The substance is :

An aqueous solution of a substance gives a white percipitate on treatment with dil ,HCI which dissolves on heating .When H_(2)S is passed through the hot acidic solution a black precipitate is obtained .The substances are not :

Identify (A) to ( C) . (a) An inorganic iodide (A) on heating with a solution of KOH gives a gas (B) and the solution of a compound ( C) .

A solid soluble in water on being heated gives brown gas and when dil. HCI is added to its aqueous solution, a white ppt is obtained. The solid is