The activity of alkaline earth metals as reducing agents

$\stackrel{\mathrm{Be}<\mathrm{Mg}<\mathrm{Ca}<\mathrm{Sr}<\mathrm{Ba}}{\to }$

Reducing power increases
From Be to Ba
Reason
In case of alkaline earth metals reducing power is decided by I.E
As IE decreases from Be to Ba  hence electron releasing  tendency increases
therefore reducing power increases