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Which statement correctly defines reduction according to the notes?
ALoss of electrons or increase in oxidation number
BGain of electrons or decrease in oxidation number
CLoss of neutrons or decrease in mass number
DGain of oxygen only in every case
Answer & Solution
Correct answer: B. Gain of electrons or decrease in oxidation number
Reduction is defined in the notes as gain of electrons or decrease in oxidation number. The given example is $Cu^{2+} + 2e^{-} \rightarrow Cu$.
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