Question
What is bauxite? What are the main impurities found in this ore?
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Answer
Bauxite $\left( Al _2 O _3 \cdot H _2 O \right)$ is hydrated aluminium oxide. It contains $30 \%$ to $70 \% Al _2 O _3$. The main impurities present in it are iron oxide $\left( Fe _2 O _3\right)$ and sand $\left( SiO _2\right)$.
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