Question

State which of the following are oxidized or reduced giving reasons ?
I) $N\to N^{-3}$
II) $C{l}^{-}\to Cl$

Answer 1

When there is gain in oxidation state or, loss of electrons it is called oxidation when, there is ,loss in oxidation state or gain in electrons it is called reductions

I. $N+3e^{-}⟶N^{3-}$

$N$ is reduced .[gain in electrons].

II. $C\overline{l}⟶Cl+\overline{e}$

$Cl$ is oxidized[loss in electrons]