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(B) Roasting is a metallurgical process in which a sulfide ore is heated in a regular supply of air or oxygen to convert it into its oxide form.In the

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$2 PbS + 3 O_2 \longrightarrow 2 PbO + 2 SO_2$

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(B) Roasting is a metallurgical process in which a sulfide ore is heated in a regular supply of air or oxygen to convert it into its oxide form.In the reaction $2 PbS + 3 O_2 \longrightarrow 2 PbO + 2 SO_2$,lead sulfide $(PbS)$ is heated in the presence of oxygen to form lead oxide $(PbO)$ and sulfur dioxide $(SO_2)$.Therefore,this reaction is an example of roasting.Option $A$ represents calcination,option $C$ represents reduction using carbon,and option $D$ represents slag formation.

Which of the following reactions is an example of roasting?

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$A$ sulphide ore is first converted into its oxide before reduction. This is done because

Giving examples,differentiate between 'roasting' and 'calcination'.

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Roasting involves

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