Which method is used for the purification of bauxite containing excess silica as an impurity?

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Which method is used for the purification of bauxite containing excess silica as an impurity? Answer: Serpeck’s method

Serpeck’s process purifies silica-rich bauxite by converting alumina into aluminium nitride, which is later hydrolyzed to yield pure alumina.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.