7. Consider the following relations for emf of an electrochemical cell (2011)
(i) EMF of cell = (Oxidation potential of anode) –
(Reduction potential of cathode)
(ii) EMF of cell = (Oxidation potential of anode) + (Reduction potential of cathode)
(iii) EMF of cell = (Reductional potential of anode) + (Reduction potential of cathode)
(iv) EMF of cell = (Oxidation potential of anode) – (Oxidation potential of cathode)
Which of the above relations are correct?
(a) (iii) and (i) (b) (i) and (ii)
(c) (iii) and (iv) (d) (ii) and (iv)