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`An^(2+)//Zn` के लिये इलेक्ट्रोड विभव `-0.78V` तथा `Cu^(2+)//Cu` के लिये यह मान `+0.34V` है इन दोनों इलेक्ट्रोडो के मध्य निर्मित सेल का विo वाo बल होगा :
A. `1.10V`
B. `0.42V`
C. `-1.1V`
D. `-0.42V`

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`E_("cell")^(@)=E_(OPZn//Zn^(2+))^(@)+E_(RPCu^(2+)//Cu)^(@)`
`=0.76+0.34=1.1V`
या `E^(@)=0.34-(-0.76)=1.1V`

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