Which one is a chemical change: Electrolysis of water or Sodium chloride exposed to sunlight?

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

List two observations which you record while burning magnesium in air.

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

You are provided with two containers made of copper and aluminium. You are also provided with solutions of dilute $HCl$,dilute $HNO_{3}$,$ZnCl_{2}$,and $H_{2}O$. In which of the above containers can these solutions be kept?

Why do we store silver chloride in dark-coloured bottles?