Home Chemistry Redox Reaction Skill Builder Which of the following statement is not corr…
Chemistry Redox Reaction Skill Builder Single Correct MCQ
Published on: August 12, 2026

Which of the following statement is not correct about oxidation number?

A
In elements, in the free or the uncombined state, each atom bears an oxidation number of zero.
B
For ions composed of only one atom, the oxidation number is equal to the charge on the ion.
C
The algebraic sum of the oxidation number of all the atoms in a compound must be 1.
D
In polyatomic ion, the algebraic sum of all the oxidation numbers of atoms of the ion must equal the charge on the ion.

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Text Solution

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The correct answer is:
C

The algebraic sum of the oxidation number of all the atoms in a compound must be zero.

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