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JEE Main 201219 MayOnline
Exam
JEE Main
Year
2012
Date
19 May
Mode
Online
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2012 · 19 May · Online · Chemistry · General Principles and Processes of Isolation of Metals

Extraction of zinc from zinc blende is achieved by

Extraction of zinc from zinc blende is achieved by

Options

  1. Aroasting followed by self-reduction
  2. Belectrolytic reduction
  3. Croasting followed by reduction with carbon
  4. Droasting followed by reduction with another metal

Correct answer

C. roasting followed by reduction with carbon

Step-by-step solution

Extraction of Zn\mathrm{Zn} from zinc blends is achieved by roasting followed by reduction with carbon. Reactions involved are : 2ZnS+3O2⟶ heat 2ZnO+2SO2 (Roasting) ZnO+C( Coke )⟶ heat Zn+CO (Re duction) \begin{aligned}& 2 \mathrm{ZnS}+3 \mathrm{O}_{2} \stackrel{\text{ heat }}{\longrightarrow} 2 \mathrm{ZnO}+2 \mathrm{SO}_{2} \text{ (Roasting) }\\ & \mathrm{ZnO}+\mathrm{C}(\text{ Coke }) \stackrel{\text{ heat }}{\longrightarrow} \mathrm{Zn}+\mathrm{CO} \text{ (Re duction) } \end{aligned}
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