Arrange the following

NaH, MgH₂ and H₂O in order of increasing reducing property.

The reducing property of hydrides is dependent upon the nature of hydride molecule that is whether the hydride is ionic or covalent in nature.

Ionic hydrides exhibit strong reducing nature as they have the tendency to lose electrons whereas covalent hydrides do not show reducing property.

Both, MgH₂ and H₂O are covalent hydrides. H₂O is less reducing than MgH₂ since the bond dissociation energy of H₂O is higher than MgH₂.

Hence, the increasing order of the reducing property is

H₂O < MgH₂ < NaH