कौन-सा सेल कॉपर इलेक्ट्रोड का मानक विधुत बिभव मापेगा

Options

A. `Pt(s)|H_2(g,0.1" bar")|H^+(aq,1M)||Cu^(2+)(aq,1M)|Cu`
B. `Pt(s)|H_2(g,1"bar")H^+(aq,1M)||Cu^(2+)(aq,2M)|Cu`
C. `Pt(s)|H_2(g,"1bar")|H^+(aq,1M)||Cu^(2+)(aq,1M)|Cu`
D. `Pt(s)|H_2(g,0.1"bar")|H^+(aq,0.1M)||Cu^(2+)(aq,1M)|Cu`

Answer

C