Which of the following statements is not true?

Which of the following statements about the given reaction are correct?

$3\mathrm{Fe}\left(\mathrm{s}\right) + 4{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right) \to {\mathrm{Fe}}_3{\mathrm{O}}_4\left(\mathrm{s}\right) + 4{\mathrm{H}}_{2 }\left(\mathrm{g}\right)$

(i) Iron metal is getting oxidised. 

(ii) Water is getting reduced.

(iii) Water is acting as a reducing agent.

(iv) Water is acting as an oxidising agent.

Balance the following chemical equations and identify the type of chemical reaction.

$\mathrm{Mg} \left(\mathrm{s}\right) + {\mathrm{Cl}}_2 \left(\mathrm{g}\right) \to {\mathrm{MgCl}}_2 \left(\mathrm{s}\right)$

Balance the following chemical equations and identify the type of chemical reaction.

$\mathrm{HgO} \left(\mathrm{s}\right)\stackrel{}{ \stackrel{\mathrm{Heat}}{\to } \mathrm{Hg} \left(\mathrm{l}\right) + {\mathrm{O}}_2 \left(\mathrm{g}\right)}$

Balance the following chemical equations and identify the type of chemical reaction.

$\mathrm{Na} \left(\mathrm{s}\right)+ \mathrm{S} \left(\mathrm{s}\right) \stackrel{\mathrm{Fuse}}{\to }{\mathrm{Na}}_2\mathrm{S} \left(\mathrm{s}\right)$

Balance the following chemical equations and identify the type of chemical reaction.

${\mathrm{TiCl}}_4 \left(\mathrm{l}\right)+ \mathrm{Mg} \left(\mathrm{s}\right) \to \mathrm{Ti} \left(\mathrm{s}\right) + {\mathrm{MgCl}}_2 \left(\mathrm{s}\right)$