How is valency helpful in writing chemical formula? Which one of the following is correct?

Formula can be written by balancing the valencies of the different atoms.

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Formula can be written by reducing the valencies of different atoms.

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Formula can be written by balancing the valencies of the same atoms.

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Formula can be written by balancing the moles.

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Solution

The correct option is A
Formula can be written by balancing the valencies of the different atoms.

If a compound is made of hydrogen and sulphur elements, then we can adjust the number of hydrogen atoms and sulphur atoms in such a way that the total valencies of hydrogen atoms becomes equal to the total valencies of sulphur atoms. Therefore, option A is correct.

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Similar questions

Statement 1: An atom of valency 2 can combine with 2 other atoms of valency 1.
Statement 2: To write the chemical formula, one must know the valency of the element.

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From the chemical formula, it can be concluded that the valency of X and Y is ___ and ____ respectively.

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