The standard electrode potential E⊖values of Al3+/Al,Ag+/Ag,K+/K and Cr3+/Cr are –1.66 V, 0.80 V, –2.93 V and –0.74 V, respectively. The correct decreasing order of reducing power of the metal is
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a
Al > K > Ag > Cr
b
Ag > Cr > Al > K
c
K > Al > Cr > Ag
d
K > Al > Ag > Cr
answer is C.
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Detailed Solution
Lesser is the reduction potential greater is the reducing power.Reduction Potential : Ag+/Ag>Cr3+/Cr>Al3+/Al>K+/KReducing Power : K > Al > Cr > Ag