Q.

Given EMg+2/Mgo = −2.37V ; ECu+2/Cu0 = +0.34V; EMn+2/Mn0 = −1.18VE0Na+/Na = −2.71V  Correct decreasing order of reducing power is

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a

Na > Mg > Mn > Cu

b

Cu > Mn > Mg > Na

c

Mg > Na > Mn > Cu

d

Na > Mg > Cu > Mn

answer is A.

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Detailed Solution

Tendency to undergo reduction  Na+< Mg+2 < Mn+2 < Cu+2Oxidizing power of  Na+< Mg+2 < Mn+2 < Cu+2 ∴Tendency to undergo oxidation will be Na> Mg > Mn > CuReducing power of Na > Mg > Mn > Cu
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Given EMg+2/Mgo = −2.37V ; ECu+2/Cu0 = +0.34V; EMn+2/Mn0 = −1.18VE0Na+/Na = −2.71V  Correct decreasing order of reducing power is