In the extraction of aluminium
Process X : applied for red bauxite to remove iron oxide (chief impurity)
Process Y : (Serpeck's process) : applied for white bauxite to remove Z (chief impurity)

Question

In the extraction of aluminium
Process X : applied for red bauxite to remove iron oxide (chief impurity)
Process Y : (Serpeck's process) : applied for white bauxite to remove Z (chief impurity) then, process X and impurity Z are :

Prashant Kotian · Accepted Answer

Correct answer: B. Step 1: Rank the elements in the Earth's crust by their mass percentages: Oxygen (~46.6%) > Silicon (~27.7%) > Aluminium (~8.1%) > Iron (~5.0%). Step 2: This makes Oxygen, Silicon, and Aluminium the three most abundant elements. Step 3: Therefore, the three most occurring elements are O, Si, Al, matching option (a).

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