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NTA Abhyas 2020

Exam: NTA Abhyas
Year: 2020
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

NTA Abhyas 2020 · Chemistry · General Principles and Processes of Isolation of Metals

The pair that does not require calcination is

The pair that does not require calcination is

Options

A $ZnO$ and $MgO$
B $\text{F}{\text{e}_{2}{O}_{3}$ and $\text{CaC}{\text{O}_{3}. \text{MgC}{\text{O}_{3}$
C $ZnO$ and $\text{F}{\text{e}_{2}{O}_{3}. {\text{x}\text{H}_{2}O$
D $\text{ZnC}{\text{O}_{3}$ and $CaO$

Correct answer

A. $ZnO$ and $MgO$

Step-by-step solution

Calcination is required for carbonate and hydrated oxide ores.

ZnO

and

MgO

both are oxides, so they donot require calcination.

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