The oxidation number of an atom in a given species (molecul…

Chemistry Redox Reaction Oxidation Number and Oxidation State Single Correct MCQ

Published on: August 13, 2026

The oxidation number of an atom in a given species (molecule, ion or free atom) is the

Actual charge of the atom

Valency of the atom

Formal charge of the atom

Actual charge of the atom if the atom exists as a monoatomic ion, or the hypothetical charge assigned to the atom in the species by simple rules.

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The correct answer is:

Oxidation number is charge on ion of an atom or the imaginary charge assigned to an atom in combined state.

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