JEE Advanced Chemistry question

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

Not in JEE Main or NEET syllabus

Extraction of zinc from zinc blende is achieved by [IIT JEE 2007]

(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 first roasted in air to convert it to the oxide: . The oxide is then reduced by coke (carbon) at high temperature: . This is carbothermic reduction,

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Question ID VK-159577