Which of the following reactions are correct?

The first three are standard: Pb(IV) oxidises $\mathrm{Cl}{}^{-}$; the PbO part of red lead dissolves as nitrate leaving brown $\mathrm{PbO}{}_2$; and $\mathrm{Fe}{}^{3+}$ is reduced by $\mathrm{Sn}{}^{2+}$. The last is the reverse of the third and does not occur because Sn(IV) is not an oxidant here.