From the following statements, which is NOT correct?
A. Reduction involves the gain of electrons.
B. Oxidation is associated with the loss of electrons.
C. The oxidized particle (atom) shows a decrease in valence number.
D. Oxidation-reduction reactions involve the loss and gain of electrons.
E. All of the above are CORRECT.
A particle loses electrons when it is oxidized. Thus oxidation is associated with electron loss. Meanwhile, electron gain is associated with reduction. Since oxidation and reduction processes occur simultaneously, loss and or gain of electrons is to be expected. An oxidized particle therefore loses its (valence) electrons. This results in an increase in valence number.