Question

Consider the following relations for emf of a electrochemical cell
(1) emf of cell=(Oxidation potential of anode)-(Reduction potential of cathode)
(2) emf of cell=(Oxidation potential of anode)+(Reduction potential of cathode)
(3) emf of cell=(Reduction potential of anode)-(Reduction potential of cathode).
(4) emf of cell=(Oxidation potential of anode)-(Oxidation potential of cathode)
Which of the above relations are correct
A. 3 and 1
B. 1 and 2
C. 3 and 4
D. 2 and 4

Answer 1

Correct Answer - D
`E_(cell)=E_("cathode (red)")^(0)-E_("anode (Red)")^(0)` or `E_(cell)=E_("cathode (red)")-E_("anode (oxid)")^(0)`
or `C_(cell)=E_("anode (oxid)")^(0)-E_("cathode (oxid)")^(0)`