Oxidation, Reduction and Redox Reactions

Find the oxidation number of the element in the following compound.

$\mathrm{N}$ in ${\mathrm{HNO}}_3$.

Find the oxidation number of the element in the following compound.

$\mathrm{Mn}$ in ${\mathrm{MnSO}}_4$.

Find the oxidation number of the element in the following compound.

$\mathrm{C}$ in ${\mathrm{CO}}_2$.

Identify the incorrect statement and correct them.

Loss of electrons is called Oxidation and gain of electron is called Reduction.

Identify the following reaction as oxidation or reduction.

${\mathrm{Fe}}^{3+} + 2 {\mathrm{e}}^{-}\to {\mathrm{Fe}}^{+}$

Identify the following reaction as oxidation or reduction.

$\mathrm{Na}\to {\mathrm{Na}}^{+}+{\mathrm{e}}^{-}$