In the ore Bauxite $A l_{2} O_{3} .2 H_{2} O$ there are two significant types – Red Bauxite and White Bauxite. Bayer’s process is applicable for __ Bauxite.

Q. The complex formed with

A l_{2} O_{3}

is leached from bauxite using concentrated

N a O H

solution is:

Q. Why

B e O

and

A l_{2} O_{3}

are amphoteric?

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Identity the principle behind the concentration of bauxite ore.

The correct option is C Amphoteric nature of Al2O3Al2O3+2NaOH+3H2O→2Na[Al(OH)4]Al2O3+6HCl→2AlCl3+3H2OHence, in both the ways, Al can be concentrated, which owes to its amphoteric nature.

The correct option is C Amphoteric nature of $A l_{2} O_{3}$
$A l_{2} O_{3} + 2 N a O H + 3 H_{2} O \to 2 N a [A l (O H)_{4}]$
$A l_{2} O_{3} + 6 H C l \to 2 A l C l_{3} + 3 H_{2} O$
Hence, in both the ways, Al can be concentrated, which owes to its amphoteric nature.