Given : E⊖Ag⊕|Ag=0.80V,E⊖Mg2+|Mg=−2.37V; E⊖Cu2+|Cu=0.34V.E⊖Hg2+|Hg=0.79V
Which of the following statements is/ are incorrect ?
If E⊖cell>0, then the reaction is spontaneous.
a. E⊕cell=0.8−0.34=0.46V (2Ag⊕+Cu→2Ag+Cu2+)
b. E⊖cell=0.34−(−2.37)=2.81,V
(Cu2++Mg→Cu+Cu+Mg2+)
c. E⊖cell=0.34−0.8=−0.46V
(Cu2++2Ag→Cu+2Ag2+)
d. E⊖cell=0.79−0.34=0.45V
(Hg2++Cu→Cu2++Hg)