JEE Main 202330 JanuaryMorning Shift

Exam: JEE Main
Year: 2023
Date: 30 January
Shift: Morning Shift
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

JEE Main 2023 · 30 January · Morning Shift · Chemistry · General Principles and Processes of Isolation of Metals

In the extraction of copper, its sulphide ore is heated in a...

In the extraction of copper, its sulphide ore is heated in a reverberatory furnace after mixing with silica to:

Options

Aseparate $CuO$ as ${CuSiO}_{3}$
Bremove calcium as ${CaSiO}_{3}$
Cdecrease the temperature needed for roasting of ${Cu}_{2}S$
Dremove $FeO$ as ${FeSiO}_{3}$

Correct answer

D. remove $FeO$ as ${FeSiO}_{3}$

Step-by-step solution

In actual practice, the ore is heated in reverberatory furnace after mixing with silica. In the furnace, iron oxide 'slags off' as iron silicate and copper is produced in the form copper matte. This contains ${Cu}_{2}S$ and $FeS$ .

$FeO + {SiO}_{2} ⟶ {FeSiO}_{3}$

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