Which of the following is the correct formula of aluminium oxide?

$A l_{2} O$

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$A l_{3} O_{2}$

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$A l O_{2}$

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$A l_{2} O_{3}$

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Solution

The correct option is D
$A l_{2} O_{3}$

Write the valency of the symbol.

$A l^{+ 3}$ $O^{- 2}$

Interchanging the valency

$2 A l^{+ 3}$ $3 O^{- 2}$

Write interchanged number at the base

$A l_{2}$ $O_{3}$

Write the formula of the compound

$A l_{2} O_{3}$

Suggest Corrections

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