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Electrode potentials and Delta G

12 questions on Electrode potentials and Delta G from the Electrochemistry chapter: 2 NEET level, 5 JEE Main, 5 JEE Advanced. Each one opens with its answer and solution.

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Given E deg(Cu^2+/Cu) = +0.34 V and E deg(Cu+/Cu) = +0.52 V at 298 K. The disproportionation 2Cu+ -> Cu^2+ + Cu has equilibrium constant K. Find log_10 K (neare... JEE Advanced level
A galvanic cell has E deg_cell = 0.50 V and the cell reaction involves 3 electrons. Taking F = 96500 C mol^-1, Delta_r G deg of the cell reaction is NEET level
For a spontaneous cell reaction under standard conditions, the correct combination is NEET level
Given E deg(Ce^4+/Ce^3+) = 1.61 V and E deg(Zn^2+/Zn) = -0.76 V. Delta_r G deg for Zn + 2Ce^4+ -> Zn^2+ + 2Ce^3+ is (F = 96500 C mol^-1) JEE Main level
E deg(Ag+/Ag) = 0.80 V and E deg(Cu^2+/Cu) = 0.34 V. The standard Gibbs energy change (in kJ, two decimals) for Cu(s) + 2Ag+(aq) -> Cu^2+(aq) + 2Ag(s) is (F = 9... JEE Main level
For a cell reaction with standard EMF E deg_cell and n electrons transferred, which statements are correct? JEE Main level
Standard Gibbs energies of formation at 298 K: Delta_f G deg(Zn^2+, aq) = -147.1 kJ mol^-1 and Delta_f G deg(Ag+, aq) = +77.1 kJ mol^-1 (elements in their stand... JEE Advanced level
The standard Gibbs energy of formation of aqueous Zn^2+ is -147.1 kJ mol^-1 at 298 K. Taking Delta_f G deg = 0 for Zn(s), H2(g) and H+(aq), and F = 96500 C mol^... JEE Advanced level
E deg(Mg^2+/Mg) = -2.37 V and E deg(Cu^2+/Cu) = +0.34 V. For the cell Mg | Mg^2+ (1 M) || Cu^2+ (1 M) | Cu at 298 K (F = 96500 C mol^-1), which statements are c... JEE Advanced level
E deg(Ag+/Ag) = 0.80 V and E deg(AgCl/Ag,Cl-) = 0.22 V. The value of -log_10 K_sp(AgCl) at 298 K is (nearest integer). JEE Main level
A galvanic cell with n = 2 has E deg = 0.46 V at 298 K and temperature coefficient ((partial E deg)/(partial T))_P = -1.0x 10^-4 V K^-1. The standard enthalpy c... JEE Advanced level
Which statement about the standard hydrogen electrode (SHE) is incorrect? JEE Main level