____ is the ore of aluminium which contains a metallic element present in group IA of the periodic table.

Bauxite

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Cryolite

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Corundum

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Magnetite

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Solution

The correct option is B
Cryolite

Cryolite is one of the ore of aluminium which contains a metallic element i.e., sodium which is present in group IA of the periodic table. The formula of cryolite is $N a_{3} A l F_{6}$ .

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Similar questions

Mendeleev predicted the existence of certain elements not known at that time and named two of them as eka-aluminium, and eka-silicon.

(a) Name the element which has taken the place of (i) eka-aluminium and (ii) eka-silicon

(b) Mention the period/periods of these elements in the modern periodic table.

(d) Classify these elements as metals, non-metals or metalloids.

(e) How many valence electrons are present in the atoms of each of these elements?

X

I A

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