Which process occurs at the anode during the process of electrolysis?

Which is the oxidising agent in the following reaction?
$CuO(s) + H_2(g) \longrightarrow Cu(s) + H_2O(l)$

Which color solution is formed when sulfur dioxide gas reduces an acidic potassium dichromate solution?

Which of the following statements about the given reaction are correct?
$3 Fe (s) + 4 H_2 O (g) \longrightarrow Fe_3 O_4 (s) + 4 H_2 (g)$
$(i)$ Iron metal is getting oxidised
$(ii)$ Water is getting reduced
$(iii)$ Water is acting as reducing agent
$(iv)$ Water is acting as oxidising agent

Which process occurs at the cathode during the process of electrolysis?

Why is a combustion reaction considered an oxidation reaction?