Question

Oxidation can be defined as the terms
(I) gain of electron and hydrogen
(II) gain of oxygen and loss of electron
(III) increase in oxidation number
(IV) decrease in oxidation number
Select the correct terms

• A. I and II
• B. I and IV
• C. I and III
• D. II and III

Answer 1

Answer: (D)

$\underset{o}{\mathrm{Zn}}\to \underset{+2}{Z{n}^{2+}}+2e^{-}$
$Zn+O\to ZnO$
Oxidation number increases, oxygen gained and loss of electrons is oxidation