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InterviewSolution
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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 white precipitate(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:A. Carbonate and sulphide oresB. Sulphide and carbonate oresC. Carbonate and hydroxide oresD. Carbonate and oxide ores |
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Answer» Correct Answer - c |
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