A cell constructed by coupling a standard copper electrode and a standard magnesium electrode has EMF to 2.7 volts. If the standard reduction potential of copper electrode is +0.34 volt that of magnesium electrode is:-A. `+3.04`voltsB. `-3.04` voltsC. `+2.36` voltsD. `-2.36` volts

A cell constructed by coupling a standard copper electrode and a stand

1.	A cell constructed by coupling a standard copper electrode and a standard magnesium electrode has EMF to 2.7 volts. If the standard reduction potential of copper electrode is +0.34 volt that of magnesium electrode is:-A. `+3.04`voltsB. `-3.04` voltsC. `+2.36` voltsD. `-2.36` volts
Answer» Correct Answer - D Mg lies above Cu in electrochemical series and hence Cu electrode acts as cathode. `E_(cell)^(o)=E_(Cu^(++)//Cu)^(o)-E_(Mg^(++)//Mg)^(o)=-2.36V`

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A cell constructed by coupling a standard copper electrode and a standard magnesium electrode has EMF to 2.7 volts. If the standard reduction potential of copper electrode is +0.34 volt that of magnesium electrode is:-A. `+3.04`voltsB. `-3.04` voltsC. `+2.36` voltsD. `-2.36` volts

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