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`Cu^(2+)//Cu`तथा `Cu^(2+)//Cu^(+)` के मानक अपचयन विभव क्रमशः `0.339` वोल्ट एवं `0.153` वोल्ट है `Cu^(+)//Cu` अर्द्ध सेल का मानक इलेक्ट्रोड विभव क्या होगा ?
A. 0.525 वोल्ट
B. 0.827 वोल्ट
C. 0.184 वोल्ट
D. 0.490 वोल्ट

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`{:(Cu^(2+)+2etoCu," "-DeltaG_(1)^(@)=0.339xx2xxF),(Cu^(2+)+etoCu^(+),-DeltaG_(@)^(@)=0.153xx1xxF),(ul("- - - + ")),("अर्द्ध अभिक्रिया "Cu^(+)+etoCu,):}`
`-DeltaG_(3)^(@)=-DeltaG_(1)^(@)+DeltaG_(2)^(@)`
`nF_(3)^(@)=n_(1)E_(1)^(@)F-n_(2)E_(2)^(@)F`
`:." "E_(3)^(@)=(n_(1)E_(1)^(@)-n_(2)E_(2)^(@))/(n)=(0.339xx2-1xx0.153)/(1)`
`=0525` वोल्ट

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