Chemistry - Redox Reactions Question with Solution | TestHub

$\text{2}\text{NaOH}\text{+}{\text{Cl}}_{\text{2}}\to \text{NaCl}\text{+}\text{NaOCl}\text{+}{\text{H}}_{\text{2}}\text{O}$
Here${\text{Cl}}_{\text{2}}$is undergoing oxidation as well as reduction.In rest of these reactions oxidation states are not changing so these are not redox reactions.
$3{\mathrm{O}}_2\to 2{\mathrm{O}}_3$
$\text{2NaOH}+{\mathrm{H}}_2\text{S}{\text{O}}_4\to \text{N}{\text{a}}_2\text{S}{\text{O}}_4+\text{2}{\text{H}}_2\mathrm{O}$
$\mathrm{A}\mathrm{g}\text{N}{\text{O}}_3+\text{NaCl}\to \text{NaN}{\text{O}}_3+\text{AgCl}$