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What is the chemical formula of alumina and anhydrous aluminium chloride?

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in Chemistry – Class 11 by (148k points)
What is the chemical formula of alumina and anhydrous aluminium chloride?

(a) Al2O3, AlCl

(b) Al2O3, AlCl3

(c) Al2O, AlCl3

(d) AlO3, AlCl3

This question was posed to me in an interview for internship.

I need to ask this question from p-Block Elements in division p-Block Elements of Chemistry – Class 11

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Correct option is (b) Al2O3, AlCl3

Easy explanation: The chemical formula of alumina is Al2O3 and that of anhydrous aluminium chloride is AlCl3. Alumina is nothing but aluminium oxide. Anhydrous aluminium chloride is prepared by heating a mixture of alumina and carbon in a current of dry chlorine.

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