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Question

The strongest reducing agent is
(1) Be
(2) Mg
(3) Sr
(4) Ba

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Solution

All these are group 2 element or alkaline earth metals.

The reducing character of alkaline earth metalincreases as we move down the group from Be to Ba because the ionization enthalpies decrease and electrode potentials become more and more negative with increasing atomic number from Be to Ba.Therefore Ba is the strongest reducing agent among these.

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