(C) Roasting is a metallurgical process in which sulphide ores are heated in the presence of excess air to convert them into their corresponding metal

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$2ZnS + 3O_2 \longrightarrow 2ZnO + 2SO_2$

(C) Roasting is a metallurgical process in which sulphide ores are heated in the presence of excess air to convert them into their corresponding metal oxides.In the given options,the reaction $2ZnS + 3O_2 \longrightarrow 2ZnO + 2SO_2$ represents the roasting of zinc sulphide $(ZnS)$ ore to form zinc oxide $(ZnO)$.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Roasting and Calcination

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The chemical reaction that involves the roasting process is:

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A
$Fe_2O_3 + 3CO \longrightarrow 2Fe + 3CO_2$
B
$2Al + Fe_2O_3 \longrightarrow 2Fe + Al_2O_3$
C
$2ZnS + 3O_2 \longrightarrow 2ZnO + 2SO_2$
D
$FeO + SiO_2 \longrightarrow FeSiO_3$

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General Principles and Processes of Isolation of Elements

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Roasting and Calcination

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Match the following:

List-$I$ List-$II$

$(I)$ Calcination $a. Fe_2O_3 \cdot nH_2O \rightarrow Fe_2O_3 + nH_2O$

$(II)$ Roasting $b. 2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$

$(III)$ Flux $c. SiO_2 + FeO \rightarrow FeSiO_3$

$(IV)$ Thermite $d. Cr_2O_3 + 2Al \rightarrow Al_2O_3 + 2Cr$

List-$I$	List-$II$
$(I)$ Calcination	$a. Fe_2O_3 \cdot nH_2O \rightarrow Fe_2O_3 + nH_2O$
$(II)$ Roasting	$b. 2Cu_2S + 3O_2 \rightarrow 2Cu_2O + 2SO_2$
$(III)$ Flux	$c. SiO_2 + FeO \rightarrow FeSiO_3$
$(IV)$ Thermite	$d. Cr_2O_3 + 2Al \rightarrow Al_2O_3 + 2Cr$