InterviewSolution
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InterviewSolution
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Given `E^(@)` values as: `Ni^(2+)//Ni=0.25V,Cu^(2+)//Cu=0.34V,Ag^(+)//Ag=0.80V and Zn^(2+)//Zn=-0.76V` Which of the following reactions under standard conditions will not take place in the specified directions?A. `Ni^(2+)(aq)+Cu(s)toNi(s)+Cu^(2+)(aq)`B. `Cu(s)+2Ag^(+)(aq)toCu^(2+)(aq)+2Ag(s)`C. `Cu(s)+2H^(+)(aq)toCu^(2+)(aq)+H_(2)(g)`D. `Zn(s)+2H^(+)(aq)toZn^(2+)(aq)+H_(2)(g)` |
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Answer» Correct Answer - A::C Cell reaction is spontaneous if its emf is +ve. |
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