JEE Main 20139 AprilOnline

Exam: JEE Main
Year: 2013
Date: 9 April
Mode: Online
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

JEE Main 2013 · 9 April · Online · Chemistry · General Principles and Processes of Isolation of Metals

Calcination is the process in which:

Options

Aore is heated above its melting point to expel $\mathrm{H}_2 \mathrm{O}$ or $\mathrm{CO}_2$ or $\mathrm{SO}_2$
Bore is heated below its melting point to expel volatile impurities
Core is heated above its melting point to remove $\mathrm{S}, \mathrm{As}$ and $\mathrm{Sb}$ as $\mathrm{SO}_2, \mathrm{As}_2 \mathrm{O}_3$ and $\mathrm{Sb}_2 \mathrm{O}_3$ respectively
Dore is heated below its melting point to expel $\mathrm{H}_2 \mathrm{O}$ or $\mathrm{CO}_2$

Correct answer

D. ore is heated below its melting point to expel $\mathrm{H}_2 \mathrm{O}$ or $\mathrm{CO}_2$

Step-by-step solution

Calcination is a process of heating a substance to a high temperature but below the melting or fusion point, causing loss of moisture, reduction or oxidation and dissociation into simpler substances.

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