When copper pyrites is roasted in excess if air, a mixture of ${\rm{CuO}} + {\rm{FeO}}$ is formed .${\rm{FeO}}$ is present as impurities. This can be removed as slag during reduction of ${\rm{CuO}}$. The flux added to from slag is

${\rm{Si}}{{\rm{O}}_2}\;\;$ which is an acid flux

Lime stone, which is a basic flux

${\rm{Si}}{{\rm{O}}_2}\;\;$,which is basic flux

NEET UG CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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Understanding +4 | -1

When copper pyrites is roasted in excess if air, a mixture of

\mathrm{CuO} + \mathrm{FeO}

is formed .

\mathrm{FeO}

is present as impurities. This can be removed as slag during reduction of

\mathrm{CuO}

. The flux added to from slag is

View answer and explanation

Correct option: A

\mathrm{Si}{\mathrm{O}_2}\;\;

which is an acid flux

Option A (

\mathrm{Si}{\mathrm{O}_2}

which is an acid flux) is correct because it reacts with the basic

\mathrm{FeO}

impurity to form slag.

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