Chemistry - Metallurgy Question with Solution | TestHub

Magnesia (MgO) and quicklime (CaO) are basic fluxes, not acidic fluxes.

Nature: Both substances are metallic oxides, making them chemically basic.

Function: They react with acidic impurities (like SiO₂) to form fusible slag.

Other Options: Statements A, B, and D are factually correct regarding Hopp's process, Parke's process, and carnallite electrolysis.

Conclusion: Since statement C incorrectly labels them as acidic flux, it is the incorrect statement.