MCQ
A cell constructed by coupling a standard copper electrode and a standard magnesium electrode has emf of $2.7$ volts. If the standard reduction potential of copper electrode is $+ 0.34 $ volt that of magnesium electrode is .............. $\mathrm{V}$
- A$+ 3.04$
- B$-3.04 $
- C$+ 2.36 $
- ✓$-2.36$