Reducing nature of alkaline earth metals increases down the group due to:
Increase in oxidation potential
Decrease in reduction potential
Both a and b
IIncrease in reduction potential
As we learn
Alkaline earth metals as reducing agents -
Strong reducing agent but weaker compared to alkali metals.
Reducing nature increases from Be to Ba due to increase in oxidation potential
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As we move down the group II, oxidation potential increase and reduction potential decrease. So, reducing nature increases as we move down the group.