Answer:
[tex]$2Na+2H_{2}O \to 2NaOH+H_{2}$[/tex]
Explanation:
Redox reaction is a reaction in which both oxidation and reduction reactions are carried out.
In given reactions, if we observe the reaction that indicating redox reaction is [tex]$2Na+2H_{2}O \to 2NaOH+H_{2}$[/tex]
This is because in this reaction oxidation number of sodium is increased from [tex]$0$ to $1$[/tex]. And thus it is oxidized while the oxidation number of hydrogen is decreased from [tex]$+1$ to $0$[/tex]
[tex]$2Na^{0}+2H_{2}^{+1}O^{-2} \to 2Na^{+1}O^{-2}H^{+1}+H_{2}^{0}$[/tex]
Hence this reaction is redox reaction
