In an oxidation process,the oxidation number:

$Zn^{2+}_{(aq)} + 2e^- \to Zn_{(s)}$. This is

Observe the following reactions:
$I$. $2H_2O_{(l)} + 2Na_{(s)} \rightarrow 2NaOH_{(aq)} + H_{2(g)}$
$II$. $2H_2O_{(l)} + 2F_{2(g)} \rightarrow 4H^{+}_{(aq)} + 4F^{-}_{(aq)} + O_{2(g)}$
Identify the correct statement from the following:

For the reaction $Ag_2O + H_2O + 2e^- \to 2Ag + 2OH^-$,which of the following is true?

When $HCl$ reacts with finely powdered iron,it forms ferrous chloride and not ferric chloride. Why?

One of the phenomena which cannot be described as combustion is