Given below are the half-cell reactions:

Mn²⁺ + 2e^- $$\to$$ Mn; E^o = -1.18 V

2(Mn³⁺ + e^- $$\to$$ Mn²⁺); E^o = +1.51 V

The E^o for 3Mn²⁺ $$\to$$ Mn + 2Mn³⁺ will be :

The equivalent conductance of NaCl at concentration C and at infinite dilution are $${\lambda _C}$$ and $${\lambda _\infty }$$, respectively. The correct relationship between $${\lambda _C}$$ and $${\lambda _\infty }$$ is given as: (where the constant B is positive)

For the non – stoichiometre reaction 2A + B $$\to$$ C + D, the following kinetic data were obtained in three separate experiments, all at 298 K. The rate law for the formation of C is:

The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :