(C) The chemical compositions of the given ores are as follows:$Calamine: ZnCO_3$ (Carbonate ore)$Siderite: FeCO_3$ (Carbonate ore)$Sphalerite: ZnS$ (

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(C) The chemical compositions of the given ores are as follows:$Calamine: ZnCO_3$ (Carbonate ore)$Siderite: FeCO_3$ (Carbonate ore)$Sphalerite: ZnS$ (Sulphide ore)$Malachite: CuCO_3 \cdot Cu(OH)_2$ (Carbonate/Hydroxide ore)Therefore,the major component of $Sphalerite$ is a sulphide-based mineral.