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JEE Main 202225 JulyMorning Shift

Exam: JEE Main
Year: 2022
Date: 25 July
Shift: Morning Shift
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

JEE Main 2022 · 25 July · Morning Shift · Chemistry · General Principles and Processes of Isolation of Metals

The compound(s) that is(are) removed as slag during the extraction...

The compound(s) that is(are) removed as slag during the extraction of copper is :

(1) $CaO$

(2) $FeO$

(3) ${Al}_{2}{O}_{3}$

(4) $ZnO$

(5) $NiO$

Choose the correct answer from the options given below

Options

A\left(3\right), $\left(4\right)$ only
B $\left(2\right)$ only
C $\left(1\right),$ \left(2\right), $\left(5\right)$ Only
D\left(1\right), $\left(2\right)$ only

Correct answer

B. $\left(2\right)$ only

Step-by-step solution

Copper ores contain iron as the main impurity. Iron react with silica and is removed as slag. Therefore, the slag formed in the blast furnace is ${FeSiO}_{3}$ .
The reaction that takes place in the blast furnace is as follows:
$FeO + {SiO}_{2} \to {FeSiO}_{3}$ (slag)

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