MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryRedox Reactions/Volumetric AnalysisConcept of Oxidation and Reduction
Which of the following statements is wrong?
A.The algebraic sum of the oxidation numbers of all✓ Correct
B.The oxidation number is an arbitrary number. It can
C.When a negative ion changes to neutral species, the
D.The oxidation number of phosphorous can vary
Explanation
a) Wrong: The algebraic sum of the oxidation numbers of all the atoms in an ion equals the charge present on the ion. b) True statement c) True 2 2Cl Cl 2e → (oxidation) d) True
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