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Question

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

A
six
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B
two
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C
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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