JEE Main 201610 AprilOnline

Exam: JEE Main
Year: 2016
Date: 10 April
Mode: Online
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

JEE Main 2016 · 10 April · Online · Chemistry · General Principles and Processes of Isolation of Metals

Extraction of copper by smelting uses silica as an additive to...

Extraction of copper by smelting uses silica as an additive to remove.

Options

A $C{u}_{2}O$
B $FeS$
C $FeO$
D $C{u}_{2}S$

Correct answer

C. $FeO$

Step-by-step solution

Smelting is a form of extractive metallurgy to produce a metal from its ore. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gasses or slag and leaving just the metal behind. The reducing agent is commonly a source of carbon such as coke, charcoal, and coal.
$FeO$ is gangue and $Si{O}_{2}$ is flux to form slag $FeSi{O}_{3}$ .

\left[FeO + Si{O}_{2} \to FeSi{O}_{3}\right]

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