Which graph correctly correlates Ecell as a function of concentrations for the cell Zn(s) + 2Ag⁺(aq) Zn²⁺(aq) + 2Ag(s), E°cell = 1.56 V Y-axis : Ecell, X-axis : log10 (a) (b) (c) (d)

According to the Nernst’s equation, the cell potential for the given equation is given as- Equation for a straight line is: y = mx + c. Or, to compare with the above equation, it can be written as – y = c -mx. As the slope is negative, it will be a decreasing graph. Therefore, the correct answer is an option (b) .