Which of the following facts about the chemical cell and concentration cell is/are INCORRECT?
(i)  Electro chemical cell is an electrolytic cell whereas concentration cell is a galvanic cell.

(ii)  Chemical cell is a Galvanic cell whereas concentration cell is a electrolytic cell.
(iii) Two half cells of both the chemical and concentration cells are chemically different.
(iv)  E_cell equations (Nernst equation) of both the cells have the term  $E_{cell}^0$  which has non-zero value