Which of the following steps are involved in hydrometallurgical process?

C u_{2} S + 2 C u_{2} O ⟶ 6 C u + S O_{2}

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C u F e S_{2} + 2 H_{2} S O_{4} ⟶ C u S O_{4} + F e S O_{4} + 2 H_{2} S

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A g_{2} S + 2 N a C N ⟶ [A g (C N)_{2}]^{-} + N a_{2} S

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C u C O_{3} + H_{2} S O_{4} ⟶ C u S O_{4} + H_{2} O + C O_{2}

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Solution

The correct options are
B $A g_{2} S + 2 N a C N ⟶ [A g (C N)_{2}]^{-} + N a_{2} S$
C $C u C O_{3} + H_{2} S O_{4} ⟶ C u S O_{4} + H_{2} O + C O_{2}$
D $C u F e S_{2} + 2 H_{2} S O_{4} ⟶ C u S O_{4} + F e S O_{4} + 2 H_{2} S$
Hydro metallurgy is a process of extraction of metals by converting their ores into aqueous solutions of metal compounds and reduction of these solutions using suitable reducing agents.Less electropositive metals like gold and silver are extracted by this method .
Water, dilute acids or sodium cyanide solution are used to convert the metal present in the ore into solution.
Hence, the following steps are involved in hydrometallurgical process.
(B) $C u F e S_{2} + 2 H_{2} S O_{4} ⟶ C u S O_{4} + F e S O_{4} + 2 H_{2} S$
(C) $A g_{2} S + 2 N a C N ⟶ [A g (C N)_{2}]^{-} + N a_{2} S$
(D) $C u C O_{3} + H_{2} S O_{4} ⟶ C u S O_{4} + H_{2} O + C O_{2}$

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What is the balanced form of the equation written below?

$C u + H_{2} S O_{4} \to C u S O_{4} + S O_{2} + H_{2} O$

C u + H_{2} S O_{4} \to C u S O_{4} + {S O}_{2} ↑ + H_{2} O

F e + H_{2} O \to {F e}_{3} O_{4} + H_{2} ↑

{C H}_{4} + O_{2} \to C O_{2} + H_{2} O

C u + H_{2} S O_{4} \to C u S O_{4} + S O_{2} ↑ + H_{2} O

C u + H_{2} S O_{4} \to C u S O_{4} + H_{2} O + S O_{2}

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