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Question

An element X forms an ion having a charge of +4 while another element Y forms an ion having a charge of −2. What will be the chemical formula of the compound formed by the combination of X and Y?

A
XY4
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B
XY2
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C
XY
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D
X2Y
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Solution

The correct option is B XY2
The valency of X is 4 and that of Y is 2.

Symbol: X Y

Valency: 4 2

Formula of the compound: X2Y4

In the chemical formula of a compound, the elements are written in their simple whole number ratio.

Chemical formula of the compound is XY2.


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