An electrochemical cell is a device in which the oxidation and reduction half rections are taking place separtely and the electrical energy is evloved as a result of the rection.In fact all redox reactions are of spontaneous nature and the free energy change`(triangleG)` is negative. This is vonverted in to the electrical energy.
(i)Which electrode acts as negative pole?
(ii) which electrode acts as positive pole?
(iii) ho does curent flow in the elctrochemical cell?
(iv) what is the value associated with the working of electrochemicals cells?

Explanation

(i) anode acts as negative pole in the electrochemeical cell
(ii) Cathode acts as p[ositive pol,e in the electrochemeical cell
(iii) Current follows from cathode to anode in the electrochemical cell
(iv) All type of batteries , both primary, secondary cells as well as fuel cells are used to lgenerate electric current f.Dry cells and lead storage cells are very commonly used.These are all electrochemical cells in nature.