JEE Advanced 2007 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Advanced 2007

Not in JEE Main or NEET syllabus

Extraction of zinc from zinc blende is achieved by

(A)electrolytic reduction
(B)roasting followed by reduction with carbonCorrect
(C)roasting followed by reduction with another metal
(D)roasting followed by self-reduction

Answer: (B)

Solution

Zinc blende (ZnS) is concentrated by froth flotation and roasted in air to zinc oxide: . The oxide is then reduced with coke at high temperature, $\mathrm{ZnO + C → Zn

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Question ID VK-037428