The efficiency of a fuel cell is given by

An electrochemical cell is shown below

Pt, H₂ (1 atm) |HCl (0.1 M)| CH₃COOH(0.1 M)| H₂ (1 atm), Pt. the emf of the cell will not be zero, because

Kohlrausch's law states that at

The most convenient method to protect the bottom of the ship made of iron is

E^o_Fe²⁺/Fe = -0.441 V and E^o_{Fe²⁺/Fe²⁺}= 0.771V, the standard emf of the reaction Fe +2Fe³⁺ →3Fe ²⁺ will be

Reduction potential for the following half-cell reactions are

Cu⁺ (aq) is unstable in solution and undergoes simultaneous oxidation and reduction according to the reaction

2 Cu⁺ (aq) Cu²⁺ (aq) + Cu (s)

Choose the correct Eo for above reaction if

Standard electrode potentials are

Fe²⁺ / Fe, E^o = - 0.44 V

Fe³⁺ / Fe²⁺ , E^o = 0.77 V

Fe²⁺, Fe³⁺ and Fe block are kept together, then

The equivalent conductance of Ba²⁺ and Cl^- are 127 and 76 ohm^-1 cm^-1 eq^-1 respectively at infinite dilution. The equivalent conductance of BaCl₂ at infinite dilution will be

Standard reduction potentials at 25^oC of Li⁺ / Li, Ba²⁺ / Ba, Na⁺ / Na and Mg²⁺ / Mg are -3.05, -2.90, -2.71 and -2.37 volt respectively. Which one of the following is the strongest oxidising agent?