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Q.

Which among the following does not contain an aluminium atom?

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a

Alumina

b

Bauxite

c

Cryolate

d

Carnalite

answer is C.

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Detailed Solution

Alumina = A l_{2} O_{3}

$B a u x i t e = A l_{2} O_{3} .2 H_{2} O$

$C r y o l a t e = N a_{3} A l F_{6}$

$C a r n a l i t e = K M g C l_{3} .6 H_{2} O$

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Which among the following does not contain an aluminium atom?