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The standard reduction potential of four element are A= -0.250 V , B = -0.136 V , C= -0.126 V , D = -0.4202V 

The element that displaces A from its compounds is 

Option: 1


Option: 2


Option: 3


Option: 4

none of these 

Answers (1)


As we have learned

Standard Electrode Potential -

If concentration of each species taking part in the electrode reaction is unity and further the reaction is carried out at 298 K, then the potential of each electrode is said to be the standard electrode potential.


 A is displaced from D because D was an E^0= -0.4202

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