Amongst the various ores of a metal (M) (sulphide, carbonates, oxides, hydrated or hydroxides) two ores [X] and [Y] show the following reactivity. (i) [S] on calcination gives a black soil (S), carbon dioxide and water. (ii)[X]Dissolved in dil. HCl on reaction with KI gives a whiteprecipitate(P) and iodine. (ii)[Y] on roasting gives metal (M) and a gas (G_(1)) which turns a acidified K_(2)Cr_(2)O_(7) solution green. (iv) [Y]on reaction with dil. HCl gives a whitw precipitat (Q) and another gas (G_(2)) which turns lead acetate solution black. and also reacts wiht gas (G_(1)) to precipitate collodial suphur in presence of moisture. The M,S ,[X] and [Y] gives greenish blue flame. The metal ores [X]and [Y] are respectively:

Amongst the various ores of a metal (M) (sulphide, carbonates, oxides,

1.	Amongst the various ores of a metal (M) (sulphide, carbonates, oxides, hydrated or hydroxides) two ores [X] and [Y] show the following reactivity. (i) [S] on calcination gives a black soil (S), carbon dioxide and water. (ii)[X]Dissolved in dil. HCl on reaction with KI gives a whiteprecipitate(P) and iodine. (ii)[Y] on roasting gives metal (M) and a gas (G_(1)) which turns a acidified K_(2)Cr_(2)O_(7) solution green. (iv) [Y]on reaction with dil. HCl gives a whitw precipitat (Q) and another gas (G_(2)) which turns lead acetate solution black. and also reacts wiht gas (G_(1)) to precipitate collodial suphur in presence of moisture. The M,S ,[X] and [Y] gives greenish blue flame. The metal ores [X]and [Y] are respectively:
Answer» CARBONATE and SULPHIDE ores Sulphide and carbonate ores Carbonate and HYDROXIDE ores Carbonate and OXIDE ores Answer :C