BITSAT 2017

Exam: BITSAT
Year: 2017
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

BITSAT 2017 · Chemistry · General Principles and Processes of Isolation of Metals

Which of the following reactions is an example of calcination...

Which of the following reactions is an example of calcination process?

Options

A $2Ag + 2HCl + \left[O\right] ⟶ 2AgCl + {H}_{2}O$
B $2Zn + {O}_{2} ⟶ 2ZnO$
C $2ZnS + 3{O}_{2} ⟶ 2ZnO + 2{SO}_{2}$
D ${MgCO}_{3}\overset{\Delta}{⟶}MgO + {CO}_{2}$

Correct answer

D. ${MgCO}_{3}\overset{\Delta}{⟶}MgO + {CO}_{2}$

Step-by-step solution

The process of conversion of a concentrated ore into its oxide by heating in absence of or in limited supply of air is called calcination. It is usually done for hydroxide, hydrated oxides and carbonate ores.

${MgCO}_{3}\overset{\Delta}{⟶}MgO + {CO}_{2}\left(g\right)$

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