Sn/HCl\mathrm{Sn} / \mathrm{HCl}Sn/HCl
Zn.Hg/HCl\mathrm{Zn} . \mathrm{Hg} / \mathrm{HCl}Zn.Hg/HCl
LiAlH4\mathrm{LiAlH}_{4}LiAlH4
KMnO4\mathrm{KMnO}_{4}KMnO4