In the chemical formula of a diatomic ionic compound, the valency of the anion is three, then the valency of the cation would be .

six

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two

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three

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Solution

The correct option is C three
$∙$ In an ionic compound, the net charge is zero. Hence, the positive and negative charges must balance each other.

$∙$ As the compound is diatomic, it means that there is only one anion and one cation.

$∙$ Hence, charge of anion + charge of cation = 0
$⟹$ -3 + charge of cation = 0
$⟹$ Charge on cation = +3

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