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Question
When a metal is to be extracted from its ore and the gangue associated with the ore is silica, then ______.
Options
an acidic flux is needed
a basic flux is needed
both acidic and basic fluxes are needed
Neither of them is needed
MCQ
Fill in the Blanks
Solution
When a metal is to be extracted from its ore and the gangue associated with the ore is silica, then a basic flux is needed.
Explanation:
The flux must be basic because silica is an acidic impurity.
\[\ce{CaO + SiO2 -> CaSiO3}\]
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Extraction of Metals
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