Calcination is used in matallurgy for removal of

Calcination is used in metallurgy for removal of

Calcination is used in metallurgy for removal of

Calcination is useful for the ore

Calcination and Roasting

Calcination and roasting

Calcination and Roasting

Which of the following statements are wrong? i) Calcination is mainly used for carbonate ore to get its oxide ii) Hydrated ore and hydroxides become anhydrous by calcination iii) Impurities like S, As and Sb are removed in the form of elemental vapours by calcination iv) Roasting is an endothermic process v) Roasting is mainly applicable for sulphide ore to get its oxide vi) Some times as a result of roasting, higher oxidation state oxide gets converted into lower oxidation state oxide.