In the chemical formula of a diatomic ionic compound, the valency of the anion is three. What will be the valency of cation?
3

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Solution

The correct option is A 3
$∙$ Diatomic ionic compound means that there is only one anion and one cation.

$∙$ Ionic compounds are neutral in nature, therefore, the net charge on them is zero. Hence, the positive and negative charges must balance each other.

$⟹$ Charge of anion + Charge of cation = 0
$⟹$ -3 + Charge of cation = 0
$⟹$ Charge on cation = +3

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