Which of the following set of reactions will NOT occur?

I) $MgS{O}_4\left(aq\right)+Fe\left(s\right)\to FeS{O}_4\left(aq\right)+Mg\left(s\right)$

II) $dilHCl+Ag\left(s\right)\to AgCl\left(aq\right)+H_2\left(g\right)$

III)$Pb\left(s\right)+H_{2}O\left(steam\right)\to PbO\left(Aq\right)+H_2\left(g\right)$

IV)$Na\left(s\right)+O_2\left(\lim ited\right)\to N{a}_2{O}_2\left(peroxide\right)$

(i) Fe is less reactive than Mg so it cannot displace Mg from $MgS{O}_4$ 

(ii) Ag is less reactive than $H_2$  so it cannot displace $H_2$ from HCl

(iii) Pb do not displace $H_2$  from steam

(iv) Na reacts with Oxygen in a limited supply

It will form Oxide, and in excess supply, it will form Peroxide.