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A(1) and A(2) are two ores of metal M.A(...

`A_(1)` and `A_(2)` are two ores of metal `M.A_(1)` on calcination gives a black precipitate, `CO_(2)` and water. Identify `A_(1)` and `A_(2)`.
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Text Solution

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`CuCO_(3), Cu(OH)_(2), Cu_(2)S, Cu, Cuo, Cu_(2)l_(2), SO_(2)`
`A_(1) = Cu(OH)_(2), CuCO_(3)`
`A_(2)= Cu_(2)S`
`Cu(OH)_(2) CuCO_(3)overset(cabination)to 2CuO+CO_(2)+overset(H_(2)O)(Black 0Solid)`
`Cu(OH)_(2)CuCO_(3)overset(dillHCl)toCUCl_(2)+CO_(2)+3H_(2)O`
`2CU_(2)Cl_+4Klto2Cu_(2)I_(2)+I_(2)+4KCI`
`underset(A_(2))(2Cu_(2)S)+3O_(2)to2CU_(2)O+2SO_(2)`
Cu_(2)S+3O_(2)to6Cu+SO_(2)`
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