Amongst the various ores of a metal (M) (sulphide, carbonates, oxides, hydrated or hydrixides) two ores [X] and [Y] show the following reactivity? (a) [X[] on calcination gives a black solid (S), water and a colourless gas which produces milkiness when passed through lime water. But this colourless gas does not decolorise acidified KMnO_(4). (b) [X] dissolved in diliute HCl. On reaction with KI gives a white precipitate(P) and iodine gas. (c) [Y] on roasting at high temperature gives metal (M) and gas (G_(1)) which turns starch iodate solution blue. (d) [Y] on reaction with dilute HCl gives a white precipatate (MS) and another gas (G_(1)) to precipitate colloidal sulpher in presence of moisture. M,S[X],[Y] gives greenish blue flame. The metal ore [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 hydrixides) two ores [X] and [Y] show the following reactivity? (a) [X[] on calcination gives a black solid (S), water and a colourless gas which produces milkiness when passed through lime water. But this colourless gas does not decolorise acidified KMnO_(4). (b) [X] dissolved in diliute HCl. On reaction with KI gives a white precipitate(P) and iodine gas. (c) [Y] on roasting at high temperature gives metal (M) and gas (G_(1)) which turns starch iodate solution blue. (d) [Y] on reaction with dilute HCl gives a white precipatate (MS) and another gas (G_(1)) to precipitate colloidal sulpher in presence of moisture. M,S[X],[Y] gives greenish blue flame. The metal ore [X] and [Y] are respectively:
Answer» CARBONATE and SULPHIDE ORES sulphide and carbonate ores carbonate and HYDROXIDE ores carbonate and OXIDE ores Answer :a